Malicious PDF — malware analysis report

Static analysis result for SHA-256 94bb5813bfac8969…

MALICIOUS

PDF

64.0 KB Created: 2020-11-25 11:43:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 37ad02d647b33f03758597524c3accf5 SHA-1: 908e8640273f3d8e23c0d0a0604eba790e3c27a2 SHA-256: 94bb5813bfac896921f6a990f41df229a73d3f778a6b25c5c8136927d52b883f
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

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://traffset.ru/strik?utm_term=oprewards+hack+robux PDF link annotation
    • https://joponavo.weebly.com/uploads/1/3/4/2/134234964/bijufari_wizokeno_wisekixedosa_maxetuzawu.pdfIn PDF document text
    • https://vuxaxumiduwo.weebly.com/uploads/1/3/4/6/134603627/55e8b86a82.pdfIn PDF document text
    • https://xalemewo.weebly.com/uploads/1/3/4/6/134665704/7425991.pdfIn PDF document text
    • https://sulekigotama.weebly.com/uploads/1/3/4/3/134307446/3617914.pdfIn PDF document text
    • https://xilorufanil.weebly.com/uploads/1/3/0/7/130739938/diwetef_fizisipu_sunif_motudi.pdfIn PDF document text
    • https://zepareremuxox.weebly.com/uploads/1/3/4/7/134772384/0496d39f70d8.pdfIn PDF document text
    • https://fepobiwebefu.weebly.com/uploads/1/3/4/5/134592484/wirape_judujada_zizaxazazuveviw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390382/normal_5fab28872eebb.pdfIn PDF document text
    • https://nisixokavenofaf.weebly.com/uploads/1/3/4/8/134891603/ce48cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460070/normal_5fb90cee7da98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368228/normal_5fb2eb8904d7e.pdfIn PDF document text
    • https://lolaxasima.weebly.com/uploads/1/3/4/7/134747116/9610263.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/49dde63f-c2fe-46ef-bc89-3a5cb2198e65/walimokotunuli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c3ea76f-a502-4878-be19-574e3a2b5c20/shattered_glass_foams.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/186ee596-386b-466e-a387-c0717e356f27/unblocked_games_dragon_ball_z_hacked.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_off0000be97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE97 5520 bytes
SHA-256: 60f9d1168608fb8113c850e01fba7ef9430933403a5572e26d05bcb605183b3f
font_01_sfnt_off0000d15e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD15E 9900 bytes
SHA-256: f92a31c004ca9aefc68444df0e071025a0a3f1ac9e633117d00faff1903cff6c

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