Malicious PDF — malware analysis report

Static analysis result for SHA-256 94a7571b348e5d81…

MALICIOUS

PDF

77.8 KB Created: 2021-10-10 22:06:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 01282fb7077402c6dde3d3fe3cf1c3cf SHA-1: e5d95f1637082143a6ca21c2cce303c03b1df660 SHA-256: 94a7571b348e5d814e2cf9d9ca78a07a436976b6959fb15a9b9f49d39f6fb781
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The 'SE_CALLBACK_LURE' heuristic specifically points to a callback phishing or tech-support scam pattern, where the document likely prompts the user to call a fraudulent number. While no scripts were extracted, the PDF structure and numerous embedded URLs suggest it is designed to lead the user to malicious content or facilitate a scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://stluciachamber.org/uploadedImages/contentImg/file/konedunumo.pdf In PDF document text
    • https://fontaine-eva.fr/userfiles/files/61611688347.pdfIn PDF document text
    • http://battle.bpv.su/content/files/files/norediru.pdfIn PDF document text
    • http://celeb.huh.hu/UserFiles/File/71592737690.pdfIn PDF document text
    • https://momentous-inst.com/uploads/image/files/mobezozurofejutabu.pdfIn PDF document text
    • http://hebakotb.net/userfiles/file/72099278564.pdfIn PDF document text
    • http://gibisch.org/files/files/74003473246.pdfIn PDF document text
    • http://nktrading.qa/file/files/zozigonulapabo.pdfIn PDF document text
    • http://hanasushi6.com/uploads/files/11386022876.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16131548e9450d---72142659142.pdfIn PDF document text
    • https://gestcargo.com/uploadfiles/file/10032696038.pdfIn PDF document text
    • http://relaxzenter.com/uploads/files/tuzumubozerorufogivugo.pdfIn PDF document text
    • http://xn----8sbemnkjd7bfu.xn--p1ai/design/img/upload/file/94024054070.pdfIn PDF document text
    • http://2015.letnifestiwal.pl/ckfinder/userfiles/files/kebiviwenovej.pdfIn PDF document text
    • http://felixefontesadvogados.com.br/ckfinder/userfiles/files/18267295941.pdfIn PDF document text
    • http://joyerialaplaza.com/ckfinder/userfiles/files/99473295878.pdfIn PDF document text
    • http://www.gdchgs.com/admin/img/files/85314626079.pdfIn PDF document text
    • http://sigmabhp.pl/userfiles/file/51698157063.pdfIn PDF document text
    • http://vesimport.ru/userfiles/file/zuxibewoxuriniz.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/taxuporedew.pdfIn PDF document text
    • https://zenit-npk.ru/files/file/80453283759.pdfIn PDF document text
    • http://dunajecbiala.pl/upload/File/wugiwuteregojuza.pdfIn PDF document text
    • http://miwon.com.vn/app/webroot/uploads/files/gijiniki.pdfIn PDF document text
    • http://taiwangallant.com/uploads/files/202109131944222778.pdfIn PDF document text
    • https://bosgo.mn/uploads/files/55989297742.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=axis+midcap+share+pricePDF 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_off0000c910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC910 10496 bytes
SHA-256: b4d103a051e3266902ae9d0c7af5f3ac79fa2eac2e3bc338d7357e6eb8722898
font_01_sfnt_off0000e0ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EC 18300 bytes
SHA-256: 596b845c3c4cc6d3d82647a4c0f63201f3b7c7b59f5a11453089dc0f8995eb62
font_02_sfnt_off000110e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1