Malicious PDF — malware analysis report

Static analysis result for SHA-256 47dc49879d12f1a6…

MALICIOUS

PDF

83.1 KB Created: 2021-07-23 20:30:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 12a56165eb4b489d462690ce598c5c2e SHA-1: ac2bb119f2ae1641c805579301896d4131b69b21 SHA-256: 47dc49879d12f1a6ee27f0cb6eb2f2e764d042ece3d045ddc4434f1d9e061a38
196 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with numerous URLs pointing to potentially compromised or disposable hosting sites. The presence of 'LOLBin token sequence in document text' suggests attempts to disguise malicious commands or links within the document's structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://theettiaresottawa.com/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/sewamadedomanipef.pdf In PDF document text
    • http://giustizianuova.it/userfiles/file/rofajoriborinonirodinori.pdfIn PDF document text
    • http://ikra-ekb.ru/files/fckeditor/file/93226669120.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/tn6hkqv87o8plm2ruu5dmktl04/bagawejinozitabak.pdfIn PDF document text
    • https://peterdegendt.be/file/13459085775.pdfIn PDF document text
    • https://banghenails.com/upload/file/85359761662.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be82fd6e6de---98951050193.pdfIn PDF document text
    • https://studiovizia.com/webroot/img/content/files/vefutapunefirisuzu.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dfb5be2e1d---3958320513.pdfIn PDF document text
    • http://learningkey.org/userfiles/mebasukeditodepu.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/d8ba22163cce45cd00fe2f54f8b79290/wajumab.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/vcgf38d212sq3cpckitop120a1/bebudupoponawate.pdfIn PDF document text
    • http://ustunongel.com/image/files/75066664898.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160c780f6afb78---63342282954.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210525182755_u98i2m.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/dccibbc2eerfkf61cmd0u1otiu/21080025226.pdfIn PDF document text
    • http://ambulatorioveterinariorigolon.eu/userfiles/files/dored.pdfIn PDF document text
    • http://zgic.ru/!upload/files/vevap.pdfIn macro / runtime command snippet
    • http://buyyoutubelikes.com/ci/userfiles/files/29502386513.pdfIn macro / runtime command snippet
    • http://woodwork.pl/ubezpiecz/obrazy/file/safofag.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/06/27/file/49819642490.pdfIn PDF document text
    • http://fsgpj.com/upfolder/e/files/20210615210813.pdfIn PDF document text
    • https://chaplains-camps.org/upload_picture/file/dugojibipufuxigokexopino.pdfIn PDF document text
    • http://ozari-ua.com/files/file/zilivigogepugawa.pdfIn PDF document text
    • http://ambulatorioveterinariorigoIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=second+conditional+giving+advice+worksheetPDF 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_off0000e03c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF853 10968 bytes
SHA-256: 56e8359c2d72f7b541ea74409246b53cf7762fb215099cf2e1fb5fec3997909e
font_02_sfnt_off00011195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11195 16956 bytes
SHA-256: ac9d17bfe629c161aa87fc2fb93f5125e881c593cc9d91ab1646ed30c23c8de2