Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2e0de032b1f44c9…

MALICIOUS

PDF

69.3 KB Created: 2021-02-21 15:30:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: eba1f01fb1e3408edef791ea94fcae55 SHA-1: cef0a4492fe01d2bc432502e2cf7b12891abdc9d SHA-256: a2e0de032b1f44c978802553b8c6b4ca0089efcbb27fdd61d443a99e5a2c3a5f
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and external links are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://crophysi.ru/strik?utm_term=machine+learning+engineer+salary+apple PDF link annotation
    • https://cdn.sqhk.co/xuxiropuwomo/1Ciejcb/56391449569.pdfIn PDF document text
    • https://cdn.sqhk.co/neliwuwo/bVXgccB/5211994185.pdfIn PDF document text
    • http://sanasojan.22web.org/ableton_live_9_free_full_version.pdfIn PDF document text
    • https://cdn.sqhk.co/jomonufo/hjd1jhb/86966285635.pdfIn PDF document text
    • https://kowagazobavov.weebly.com/uploads/1/3/0/8/130874359/rowoparepinoteza.pdfIn PDF document text
    • https://wagimudo.weebly.com/uploads/1/3/4/4/134475497/45fb1.pdfIn PDF document text
    • http://prodit.space/cosmos_carl_sagan_epub_download38thy.pdfIn PDF document text
    • http://doucheapp.xyz/wulenadelaruzewerutemiwejkouwe.pdfIn PDF document text
    • https://kevanosum.weebly.com/uploads/1/3/0/9/130968994/runewobipoparowusipi.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefegevo/RggWuDJ/dr_reversi_game_download.pdfIn PDF document text
    • https://nonizevotete.weebly.com/uploads/1/3/1/3/131384281/c468ad1643441.pdfIn PDF document text
    • http://triple-doska1.club/72371716266x3cgr.pdfIn PDF document text
    • https://pumutetigowon.weebly.com/uploads/1/3/4/6/134699291/dawun.pdfIn PDF document text
    • https://vixawesomuwevu.weebly.com/uploads/1/3/5/3/135387162/f8d1de4f05bba.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/ibhgibC/61548460352.pdfIn PDF document text
    • https://fugunukotuji.weebly.com/uploads/1/3/4/5/134589730/palawodoka-sonadepofin.pdfIn PDF document text
    • http://storeyou.store/rokudenashi_majutsu_koushi_to_akashic_records_light_novel_summaryg9vel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zisekajoreva.epizy.com/abituriyent_jurnali_2019_indir.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/mastodon_blood_and_thunder.pdfIn PDF document text
    • http://lakelasu.rf.gd/cazadora_de_hadas_brave.pdfIn PDF document text
    • http://webenawawejoped.rf.gd/rotud.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/3492773173.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/27119071121.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_off0000d0bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0BD 5300 bytes
SHA-256: 998d9bca550db3cea2e67832b1714b18e4d1a9efe99e3920587c84d419579ab6
font_01_sfnt_off0000e2d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D2 10904 bytes
SHA-256: f108323a0c4b3720a9fbda2dd4397b53840813bae833e64af2cd4ae480183afd

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