Malicious PDF — malware analysis report

Static analysis result for SHA-256 f22a75feee819931…

MALICIOUS

PDF

75.3 KB Created: 2020-12-24 18:00:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d10702c48fbcdd98ff9d4dacf6f32ece SHA-1: 2623f58f7b10e85973fa4cca94c286e5f631cddf SHA-256: f22a75feee819931e7f508e1103479368f889f1ae5719fd471ea9b5235513eeb
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-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://trafficel.ru/strik?utm_term=fishdom+cheats+2020+ios PDF link annotation
    • https://pezopipowom.weebly.com/uploads/1/3/1/4/131406060/megopipedi-kekewubu-zipepune-sixerobev.pdfIn PDF document text
    • https://cdn.sqhk.co/zolaxadivowe/8jijd1y/megelebuzatefew.pdfIn PDF document text
    • https://zegaxazidunuxe.weebly.com/uploads/1/3/4/7/134746987/94fc38ba9b819bf.pdfIn PDF document text
    • https://kelobutino.weebly.com/uploads/1/3/0/9/130969458/7735552.pdfIn PDF document text
    • https://cdn.sqhk.co/sofopiro/ibcyhgu/download_english_songs_love_me_like_you_do.pdfIn PDF document text
    • https://bupigesow.weebly.com/uploads/1/3/4/3/134360728/bukupofifapatan-butozero.pdfIn PDF document text
    • https://gijegemolu.weebly.com/uploads/1/3/1/3/131380899/8dd7d2492ad6e46.pdfIn PDF document text
    • https://zukamukenipebo.weebly.com/uploads/1/3/1/3/131380388/rotubav.pdfIn PDF document text
    • https://megeleju.weebly.com/uploads/1/3/4/3/134319984/fakejusaloju_timekak.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/df309c01-2cc4-45ce-9c4a-87359dd1d2d1/safawomisisopulamilo.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/bhairava_dweepam_telugu_movie_song.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/biwoxulazal.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_off0000e7e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E9 5280 bytes
SHA-256: 5cb488cef5c6d4b8d9b6c7a428b8e09e085c7028181f6085c81bc1750e05f6ac
font_01_sfnt_off0000f9b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B8 11372 bytes
SHA-256: 29ad109010a21450ee872f78e482f443e46e5f24db81791412230e3aac4b6df7

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