Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c8ec4fbe8020d39…

MALICIOUS

PDF

62.2 KB Created: 2021-02-16 21:13:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f52db537e4cac68704f31a2122d264b6 SHA-1: a921af7b1215b6d33cf142d6e8217dfdd78d7d25 SHA-256: 2c8ec4fbe8020d39d71d6dbf2c90b540e696de722d111d978a358290a900b358
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://druttle.ru/wix?keyword=www.maxgames.com+the+game PDF link annotation
    • https://zexirajeroluwub.weebly.com/uploads/1/3/4/8/134848753/pewizatazeka.pdfIn PDF document text
    • http://golipodib.22web.org/lake_hartwell_fishing_report_crappie.pdfIn PDF document text
    • https://kejobogufepemis.weebly.com/uploads/1/3/0/7/130775396/rumevatepofel.pdfIn PDF document text
    • https://deriwofapavuz.weebly.com/uploads/1/3/4/3/134311795/rajixi.pdfIn PDF document text
    • https://cdn.sqhk.co/puzukebejas/Tibja3j/duwerazixezozipi.pdfIn PDF document text
    • http://pirizatifi.iblogger.org/51337199484.pdfIn PDF document text
    • https://tekeginisexufu.weebly.com/uploads/1/3/1/3/131381150/fogusezabofuzogu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384822/normal_60281fb6995b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368763/normal_6015c33eb5558.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490116/normal_601e166d4fd57.pdfIn PDF document text
    • http://votewimuvuxa.iblogger.org/23531487707.pdfIn PDF document text
    • https://zomurigokolu.weebly.com/uploads/1/3/1/4/131437535/a533cf3265.pdfIn PDF document text
    • http://lowafax.22web.org/wowilizutoduxowoberefipa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499021/normal_5ffc1cbbb5dcb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ramasewo.epizy.com/cleveland_browns_updated_injury_report.pdfIn PDF document text
    • http://pefafimu.rf.gd/best_android_phone_under_15000_december_2018.pdfIn PDF document text
    • http://pajuniwosedi.rf.gd/30324895388.pdfIn PDF document text
    • http://vemevusakeke.epizy.com/vevuzetoxurutufowuludo.pdfIn PDF document text
    • http://mutifitiwexo.epizy.com/hollywood_cartoon_movie_in_english.pdfIn PDF document text
    • http://witopovuketoj.epizy.com/77827352175.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_off0000b783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB783 5288 bytes
SHA-256: 3cc220b101098baf7483cd1f46378bfefb2aaff1caa23c0842eaecd01b043f5f
font_01_sfnt_off0000c981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC981 9928 bytes
SHA-256: 5f0777c0b12292caec6e3684196245f6f61d5a5ac539b17b3856106d0bdb1f30

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