Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f77d70d001f08b5…

MALICIOUS

PDF

70.2 KB Created: 2021-02-02 23:54:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4cea207611f46cad1aa4d3d8cb7d5f52 SHA-1: 8e4d88d3c19c5b95b64ce3c4c0878f2ef5b87b0f SHA-256: 7f77d70d001f08b591324174036d92fc39f743e64fd788708a47606680966921
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://jacksth.ru/aws?utm_term=automatic+reply+outlook+template+vacation PDF link annotation
    • http://bofinaposo.iblogger.org/arua_chaula_duba_new_song.pdfIn PDF document text
    • https://cdn.sqhk.co/menasimax/e8hhqX2/konegixinimukebavurumun.pdfIn PDF document text
    • https://zizojatemizowen.weebly.com/uploads/1/3/4/0/134016780/c37ceb120c6e7.pdfIn PDF document text
    • https://waxukazo.weebly.com/uploads/1/3/1/0/131071095/nisipikanitadij_pigufafalale_puzosujar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444366/normal_5fe383cc553fc.pdfIn PDF document text
    • https://vataripisak.weebly.com/uploads/1/3/4/6/134600115/7295284.pdfIn PDF document text
    • https://pujawemufupu.weebly.com/uploads/1/3/2/6/132680931/6188537.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vonikolodu.rf.gd/1st_rank_raju_full_movie_free.pdfIn PDF document text
    • http://pigibotokaper.epizy.com/34139037589.pdfIn PDF document text
    • http://genenapukiral.epizy.com/angular_form_validation_on_change.pdfIn PDF document text
    • http://gezibetaw.epizy.com/cbse_class_10_revaluation_form_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/lugikuwipevudage.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD517 5116 bytes
SHA-256: ad0f8623f6b14cc31284ed7a50ef94a939f88337c556d32fcbc0593ac71418c4
font_01_sfnt_off0000e672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE672 10520 bytes
SHA-256: 26c4303369dfd02a228c3c7d311bdac0ce675c5c815e6d559d3f26b42a25c665

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