Malicious PDF — malware analysis report

Static analysis result for SHA-256 e05434db1f975123…

MALICIOUS

PDF

99.7 KB Created: 2021-06-02 04:34:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 785d4b1492e1a7abbbc925c80eceab04 SHA-1: cd8f4d85cf82bdcd02ce25883b4699334e05cc3c SHA-256: e05434db1f975123168546e0465a1f7c300a92aaf0880944d9b8eef5c719a589
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 0.9995

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://leonvi.ru/123?utm_term=band+of+brothers++movie PDF link annotation
    • https://xobijetulotifo.weebly.com/uploads/1/3/4/2/134234675/29194089.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370768/normal_6052573a71035.pdfIn PDF document text
    • https://musaseruvadix.weebly.com/uploads/1/3/4/5/134581888/xusaw_xuruwuladufaw_sixuwevafe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369524/normal_5feca14d41967.pdfIn PDF document text
    • https://bijuxoku.weebly.com/uploads/1/3/4/9/134901677/kivekageto.pdfIn PDF document text
    • https://vapomawuwe.weebly.com/uploads/1/3/1/3/131398268/534223.pdfIn PDF document text
    • https://lepoxaxilil.weebly.com/uploads/1/3/4/4/134498836/bonukodapuvojusevema.pdfIn PDF document text
    • https://xitupigavogom.weebly.com/uploads/1/3/4/4/134474669/lufepomalumip-pozeta-mijiposakuvis.pdfIn PDF document text
    • https://sexozorojupur.weebly.com/uploads/1/3/4/3/134390270/mesebo_gosil_tipobonugaviva_fovipesowal.pdfIn PDF document text
    • https://lobusejorul.weebly.com/uploads/1/3/5/3/135338183/518f02.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vimadutukad.pbworks.com/w/file/fetch/144481275/puderifepomuxe.pdfIn PDF document text
    • http://katafuzum.pbworks.com/w/file/fetch/144483999/wwe_2k14_download_ppsspp_gold.pdfIn PDF document text
    • http://midevodimu.pbworks.com/f/wupeg.pdfIn PDF document text
    • http://vawijoj.pbworks.com/f/questions_that_are_answerable_by_yes_or_no_are_called.pdfIn PDF document text
    • http://dekokos.pbworks.com/f/80883574407.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D1 29080 bytes
SHA-256: 84da0e79823e34070b6be07297ea972d1acb8236aa1e3dee9d58ff457080f992
font_01_sfnt_off00013b39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B39 5152 bytes
SHA-256: 50f6a741490805c68d5ce3f921ecdce2efcfcf236c7f727893b3d91477044e91
font_02_sfnt_off00014c92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C92 10664 bytes
SHA-256: 449be7154de05be1641ca0334838430e9a2f36e99d522e304d206d77d98e30f8
font_03_sfnt_off00017127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17127 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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