Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a159a24c1a17ded…

MALICIOUS

PDF

109.5 KB Created: 2021-09-05 17:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 302c9f7e4ef817f22a02d6fc472ac632 SHA-1: 9dde80f4e65f54da47d3d9155ed0cb913d4986c5 SHA-256: 2a159a24c1a17ded03217277f194f30f9430f620aa8e8fa14e452fd27318c690
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of callback phishing. The heuristic 'SE_CALLBACK_LURE' indicates the document prompts users to call a phone number for billing, refund, or security issues. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to host malicious content or redirect users to phishing sites, likely as part of a broader phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e891044e6---warewobonovudosurapudir.pdf In PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a91ec77d8c---lixobasofajawonegomogejiw.pdfIn PDF document text
    • http://thebankcardservices.com/uploads/files/pefaletusuxekapakivafuguw.pdfIn PDF document text
    • http://hpmcfamilyreunion1968.com/clients/83891/File/peris.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c317f3087fa---2510827119.pdfIn PDF document text
    • https://blogsma.com/files/47913556302.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/vabafabarabamutetopunit.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c1ef8f60f4b---27487203301.pdfIn PDF document text
    • http://kleiberit.ru/files/file/52197254206.pdfIn PDF document text
    • https://egyiksem.hu/uploads/file/mogokadujomu.pdfIn PDF document text
    • http://luberoff.com/userfiles/file/38510569940.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/miwazodupaxu.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3f0c4a6ab---dexesipogilodejamepimod.pdfIn PDF document text
    • http://btc-ltd.com/upload/file/41838971095.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/jawetinelikemonoje.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160882b3952f2c---luzusofajixoleragafokev.pdfIn PDF document text
    • http://startent.ru/SITE/files/editor/file/vewezumekewixupugedetuj.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/pawomofudipimaxowunetuvam.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc885b008d---nuwovuvekubizumatabomulej.pdfIn PDF document text
    • https://bselink.com/userfiles/file/vesutakosal.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/f374cbdf0afce53d29973c47a970dbb8/47002623217.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/radulogogakuxijujavubojuv.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e94457b9f---tabutalelijem.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/26432e30cb9c60dfb01b934848f5fbb2/vemadolanirofubo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=flashlight+guitar+chords+pdfPDF 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_off00014655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14655 10740 bytes
SHA-256: dea502f1d22772adafd06ec8a7c8c9ad8a33cb3741ab995fefdc36dd97739b10
font_01_sfnt_off00015ee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EE9 18792 bytes
SHA-256: 9173bc3060716a7ce13f182a51bd5a4b80ada78305b03b16fede4f111dfebb62
font_02_sfnt_off00018fa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18FA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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