Malicious PDF — malware analysis report

Static analysis result for SHA-256 480977137b0f6885…

MALICIOUS

PDF

85.7 KB Created: 2021-03-24 08:15:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9179827a9dbfef44e3bfe9c45712e0a4 SHA-1: dbd4d43ead1ff831d0dff0e409d9d3d5f68302ae SHA-256: 480977137b0f68857b1342aeaa9f42ff8e45175f855cd55d7630720317657aef
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or SEO link farm. It contains numerous external links, with a significant number pointing to disposable hosting, suggesting an attempt to distribute content or manipulate search engine results. The presence of external URIs and a link farm indicates a potential for redirecting users to malicious sites or downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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://druttle.ru/award?keyword=mastering+office+365+administration+pdf PDF link annotation
    • https://cdn.sqhk.co/lazimafuxuxi/cZHiiw2/word_collect_answers.pdfIn PDF document text
    • https://dawosovakix.weebly.com/uploads/1/3/6/0/136097295/jeparebesu.pdfIn PDF document text
    • https://cdn.sqhk.co/pimidima/gfhaieF/10987192093.pdfIn PDF document text
    • http://kamini33.ru/73355980178o3x35.pdfIn PDF document text
    • https://zujituxo.weebly.com/uploads/1/3/2/6/132681889/a3b8fadea.pdfIn PDF document text
    • http://vomenelavive.22web.org/22564482111.pdfIn PDF document text
    • http://nurinubofed.iblogger.org/boss_fs-5l_uses.pdfIn PDF document text
    • https://nikalakikezune.weebly.com/uploads/1/3/4/7/134753818/367ab2.pdfIn PDF document text
    • http://vulgargirls.fun/17247388506ryvfv.pdfIn PDF document text
    • http://1-bog.ru/786737047699dkm4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://02408c19-b9f6-4996-a596-1d5b7e46c8d3.filesusr.com/ugd/c83fdb_f231e699ce1b4d2680c0fb96f687340d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6814cfa3-b305-460c-bddc-b6281a7fbc3e/nixuxotudazilibediju.pdfIn PDF document text
    • http://jowazojulowidag.epizy.com/68974598308.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d675b495-ccb6-4946-a96f-c9e6c3ca03cd/jubufisejan.pdfIn PDF document text
    • https://5b3a2631-baab-4d1f-8161-183aa5bfd7a2.filesusr.com/ugd/5dc2b7_122145e77de947e19b39667bd692810c.pdf?index=trueIn PDF document text
    • https://acaa17bf-cf2e-4132-a9e9-810271eb8bc4.filesusr.com/ugd/ab5b4c_56cb218b4852415e9055f7f2972af16c.pdf?index=trueIn PDF document text
    • http://gukominutokowu.epizy.com/23021505715.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41d4fcce-6c3d-42de-9615-2de308ed76ac/larelugebuvitutiwubusezi.pdfIn PDF document text
    • https://56c41596-c8b3-4aa7-a075-23c9724d7f97.filesusr.com/ugd/ed77b2_f6c37f0e1bcf4245a77ec63b6db44dc6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/39147c9f-466d-4640-85ae-fa7f44b7c479/tirijutakavabaluxif.pdfIn PDF document text
    • http://xamudakosenezi.rf.gd/benchmark_pc_free.pdfIn PDF document text
    • https://6b137298-3864-41c5-aaa3-11744000c3c2.filesusr.com/ugd/b916f4_9d5a5d6459da44eb94ec715586c0c316.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb680f42-51de-49e0-9cbd-c8051f4d3317/83610183122.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_off00010bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDC 5892 bytes
SHA-256: b1df8dcfa42cb88abc2b9ef2aba6306508117785aba376b894b40101994c7a62
font_01_sfnt_off00011fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FDB 12188 bytes
SHA-256: 5c799b5b5e96865774c9d2af2cd911827de0479599103603f56c0323fa0f42a7