Malicious PDF — malware analysis report

Static analysis result for SHA-256 742e1454074ec0a5…

MALICIOUS

PDF

87.6 KB Created: 2021-03-17 09:58:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 58077adf0439257097cf39a61d781fbf SHA-1: b86ce7465c8652652400c895314cd6ae646db8a2 SHA-256: 742e1454074ec0a57b16d9ab337d0b2c89a969232b49522b3311ecab99bc5ad4
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. One of the primary URLs points to a 'subway surf hack apk' download, indicating a lure for potentially unwanted or malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://pelibifir.ru/wix?keyword=subway+surf+hack+apk+rexdl PDF link annotation
    • https://nopirepogoduk.weebly.com/uploads/1/3/4/0/134095858/zuwefojidijupi-sejuxurozazub-xejebeli.pdfIn PDF document text
    • https://bemawupi.weebly.com/uploads/1/3/0/7/130740003/1114559.pdfIn PDF document text
    • http://fadewujetenuve.mywebcommunity.org/download_marvel_deadpool_comics.pdfIn PDF document text
    • http://vijexibat.mywebcommunity.org/48615238566.pdfIn PDF document text
    • http://mumolazesinidix.getenjoyment.net/how_to_get_a_private_investigator_license_in_georgia.pdfIn PDF document text
    • http://minesaxofunawi.getenjoyment.net/20777415388.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/hjifif4/91183344620.pdfIn PDF document text
    • https://cdn.sqhk.co/xetorexevapi/17iTifL/slime_wallpaper_for_mobile_phone.pdfIn PDF document text
    • https://cdn.sqhk.co/vogigoda/gcG3mwR/93599605731.pdfIn PDF document text
    • https://vorevowupi.weebly.com/uploads/1/3/4/6/134633589/jefebefiw_binusilati_vusiv_sulurafiteweb.pdfIn PDF document text
    • https://cdn.sqhk.co/kigimole/gh0jdwP/42451968776.pdfIn PDF document text
    • https://mutabezikubi.weebly.com/uploads/1/3/4/7/134739743/9d6c07e7bd93.pdfIn PDF document text
    • https://mojabizozawobe.weebly.com/uploads/1/3/4/6/134699592/gulesuwilivepodaw.pdfIn PDF document text
    • https://rakatifuz.weebly.com/uploads/1/3/5/9/135964199/8966077.pdfIn PDF document text
    • https://fupotitora.weebly.com/uploads/1/3/4/8/134883452/vesevilapowuma.pdfIn PDF document text
    • https://xevoniwibefi.weebly.com/uploads/1/3/5/9/135984774/talolu-tikuvabiribun.pdfIn PDF document text
    • https://wukavuzadit.weebly.com/uploads/1/3/0/7/130776823/568ea7b4e60e33.pdfIn PDF document text
    • https://cdn.sqhk.co/medujebukoma/jJigocs/player_guide_for_unknown_battlegrounds_xbox.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/952abb71-e17d-46ca-b573-0e0d1a31813d/honda_gc160_pressure_washer_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b36df61-1f78-4d2b-99aa-40653c6ad904/danafelinaditewaresiw.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/48325773088.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/bosolav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90feb03d-5278-43d5-9413-314acdf56c29/13773319505.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd6d5eeb-137b-4466-90a7-aba796d5b354/ipod_shuffle_generation_1_charger.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/caller_name_speaker_announcer_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/64824364808.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AB 5812 bytes
SHA-256: cbbddf8c9996e9cb5235b15d731ae1e8ae4f785bc5074f7d25f5f046d5f01f9a
font_01_sfnt_off00010d89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D89 11164 bytes
SHA-256: adf93c91ae5bc89a4dd595a6d3fbec1b64488b264bff4a8c5407357f1d8e7a78
font_02_sfnt_off000133ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133EA 18240 bytes
SHA-256: dce00bf8a94d25d548ddbf44c6320190c23a03b5508507b8fb8726caba69f7d2