Malicious PDF — malware analysis report

Static analysis result for SHA-256 083125c8ef812ff5…

MALICIOUS

PDF

92.6 KB Created: 2021-07-02 08:02:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 563c8ab81ff8497752bb50029d068620 SHA-1: e5058903b54c2e524ddf459d2867cb8c587226e2 SHA-256: 083125c8ef812ff57e067dd35826ae60b9d4f2808a46e9f36389e6b4c7867d85
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to compromised websites and is flagged as a payment redirection lure, indicating a phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a phishing campaign designed to trick users into believing their financial instructions have changed.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://chinoboxingclub.com/clients/36032/File/48137464304.pdf In PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f08621feaf05e428aad72c630dff82cf/71770014217.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/8156426f96e343794d4224f41fabd0d8/dexur.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3b7a86bab---rewozoreronofitafinewofu.pdfIn PDF document text
    • http://www.iece.in/userfiles/file/80594019032.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/80f921425a1f9584253f8e0f7188c46b/jadawobujegar.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/322fbce25972592105be7826aa528d82/detovumirinijuwuvute.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088b173d3c03---losoroxewipilowebololo.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609059b54231a---12548214230.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/995d1cfd923497f262256cbfc681ddf3/3145763165.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ae9e6bd6762---80618123376.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160972ff89a6b1---japawise.pdfIn PDF document text
    • http://pm-property.pl/userfiles/file/fisojinadanajep.pdfIn PDF document text
    • http://perseverance.cyou/updatefiles/file/94098344799.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/3c2dd5ee03165fe311a4705a38d79eda/17504429991.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/4bdb8fa82c2f241f7a16980d876811e1/63037475593.pdfIn PDF document text
    • http://mamnonlittlesun.com/upload/files/31493081760.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/defitu.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/77147294786.pdfIn PDF document text
    • http://ipost.mn/ckfinder/userfiles/files/36711855341.pdfIn PDF document text
    • http://www.toptehnik.si/images/putivimudanofunomowuwuni.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a533b6551c---dixezogagevolovelavanezak.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/47ab85c4b6678fe6fec46f928a339338/12084999173.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/2618fa1900223e071ee053de4697610b/kavibovakamakeg.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16092965a37c86---funimegikexes.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/04a3c6f014b67c00a0f6e9210043ed1a/wivizo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=how+long+does+it+take+a+bank+to+process+a+direct+depositPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001039d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039D 10996 bytes
SHA-256: ea05ae95b33252f593067957b68d7736c498665a22d80bf86a458e3cb4ba2737
font_01_sfnt_off00011ce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE5 18148 bytes
SHA-256: 934f40b74a217e73e310b827fc18cc643aa39b52f1a5ba27398de71114b227e1
font_02_sfnt_off00014c4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.