Malicious PDF — malware analysis report

Static analysis result for SHA-256 495d8907008ed511…

MALICIOUS

PDF

88.2 KB Created: 2021-07-29 20:07:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7a9257d7bb710563666a3c9972250d97 SHA-1: 016eec0cf0269f656279e7716b4ad518cd79d174 SHA-256: 495d8907008ed5114c1157ff54353bdcdbe9d14fd2882c7484dd0498e261751b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to various compromised WordPress upload locations and disposable hosting sites. The document's content, as suggested by the 'SE_PAYMENT_REDIRECT_LURE' heuristic, likely attempts to trick users into downloading further malicious content by impersonating financial or payment-related communications.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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 https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9950954bb---32673754438.pdf In PDF document text
    • http://doks-films.com/pcms/content/file/lipofefenetuguvazip.pdfIn PDF document text
    • http://humanlitech.com/files/files/83249993854.pdfIn PDF document text
    • http://nsureunion.com/clients/71556/File/lefoz.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/82570e794c1c93f1e0d055ed8c902bb9/toxupijepetisivaxaludedu.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b28885c86f6---narimudisalomopudofisava.pdfIn PDF document text
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/2775202917.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c96c127c6db---7679243890.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a91b9ecafc1---jilopolopumazuwenotosi.pdfIn PDF document text
    • http://hengtongrongshang.com/jingkelun/userfiles/files/20210722024707.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/1152d7ffd3b9e3bd5ff54f0bd3218a16/2301849893.pdfIn PDF document text
    • https://motty-etai-sharon.com/files/files/18400380981.pdfIn PDF document text
    • http://galgalesh.com/userfiles/file/wawabafumelusabivas.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ab50481b2---tomakanosu.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160781aad63c0a---47065706628.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/49276171343.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609018fded99b---22329440230.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/47629271033.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/1b07b50ff41a854f88692f9496ad4eb4/83610465615.pdfIn PDF document text
    • http://www.deewanalarab.com/up_imgs/67296021906.pdfIn PDF document text
    • http://leinerpakgelatine.com/survey/userfiles/files/naxoj.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2a92c431a---44443559321.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/uceculc31mtqql143m2qhvefg2/wonidiluzo.pdfIn PDF document text
    • http://dainichiji.com/upload_ckr/files/7729626173.pdfIn PDF document text
    • http://slsnn.ru/content/file/fetirezivakezo.pdfIn PDF document text
    • https://trexanh.net/upload/files/biwofelo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=can+you+use+turbo+prepaid+card+at+atmPDF 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_off0000f444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF444 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010c5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5B 11016 bytes
SHA-256: 266cbe9848838b704598f35fdd6312df534547fad5e8710caa5ca5766e132ea4
font_02_sfnt_off000125d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125D1 17092 bytes
SHA-256: d07b1437fd32792f11776f797578b59cf4db8831b4bab28c100484d3e4ff30c9