Malicious PDF — malware analysis report

Static analysis result for SHA-256 49151307b91fa28e…

MALICIOUS

PDF

76.2 KB Created: 2021-04-05 08:53:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 6f0345f7e2a1b429aa05ba55a90bdab8 SHA-1: 8ac0baf8c7b58779a87d5f5485d468c675dda3b5 SHA-256: 49151307b91fa28e9dbfada38d1027d6f816969badc7c8946e13180d58402c4a
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting domains, indicating a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the PDF structure and link farm behavior suggest an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://wiruwopifezub.weebly.com/uploads/1/3/4/3/134345133/kukalub.pdf In PDF document text
    • https://mimitokiwunas.weebly.com/uploads/1/3/4/0/134012498/xipegojapubutenem.pdfIn PDF document text
    • https://cdn.sqhk.co/lusajiki/ifghihj/rozanodujekinarilaguze.pdfIn PDF document text
    • https://cdn.sqhk.co/tijonodevi/bhcbWgg/halloween_male_vampire_makeup_ideas.pdfIn PDF document text
    • https://cdn.sqhk.co/zejejofe/IhhibWq/vidolibuvekofejozoxe.pdfIn PDF document text
    • https://jopakawinotu.weebly.com/uploads/1/3/1/4/131407654/3c7c69f6.pdfIn PDF document text
    • https://jenajurowob.weebly.com/uploads/1/3/1/4/131408252/folorero.pdfIn PDF document text
    • http://xemifexebep.iblogger.org/xuvefixebuximifusujiwu.pdfIn PDF document text
    • https://rizofuruw.weebly.com/uploads/1/3/0/8/130873790/0aacf.pdfIn PDF document text
    • https://cdn.sqhk.co/wovenebi/D2bgjs2/goguponifov.pdfIn PDF document text
    • https://korisupugi.weebly.com/uploads/1/3/5/3/135308649/68c4601db67c3f.pdfIn PDF document text
    • https://cdn.sqhk.co/vorebilifi/Tggu7je/72805826426.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/KjdSuPfhPRY/wb?keyword=why%20is%20my%20lg%20tv%20red%20light%20flashingPDF link annotation
    • http://giwalawap.epizy.com/authenticator_microsoft_apk.pdfIn PDF document text
    • http://werowelunan.epizy.com/fozewabalafiteneriwax.pdfIn PDF document text
    • http://gagemusogigubew.epizy.com/adverb_word_search.pdfIn PDF document text
    • https://5ec50ee2-6c76-415b-b731-82d7de26534b.filesusr.com/ugd/826e74_58fd32cb0301488da614566e78b719b6.pdf?index=trueIn PDF document text
    • http://gomiguru.epizy.com/sugaguxava.pdfIn PDF document text
    • https://f7f2eb1f-4ce6-40bf-b337-6bcc2c9c1a95.filesusr.com/ugd/dc6899_41fbbf7bafc54b949f4a1c48a60ee6eb.pdf?index=trueIn PDF document text
    • http://sorodoxum.epizy.com/ballaststoffreiche_lebensmittel_liste.pdfIn PDF document text
    • http://juguxawe.rf.gd/artistry_ideal_radiance_hidratante_iluminador.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1E 5496 bytes
SHA-256: 6a05b0a8d392d3072b7fdac9990875421a211611664f6f618770d8887ae1f228
font_01_sfnt_off0000feba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBA 10820 bytes
SHA-256: e89ae936ca41ab05f6a111934dc3be6fc6f10ab1178d80c4718691e747f9eb56

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