Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3ccc409f83df0c1…

MALICIOUS

PDF

79.3 KB Created: 2021-02-21 13:54:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f6f228d19a5f8a7a3552b1f730d2c525 SHA-1: 8b270608942792baa0cc107976c4e59e6270feee SHA-256: a3ccc409f83df0c1fb940a048f0721e9bffcc980b01a53288aeb0f5e9a91aaff
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to suspicious domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, likely for SEO manipulation or to host malicious content. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to malicious sites, potentially for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://jottigo.ru/wix?keyword=affluenza+book+pdf PDF link annotation
    • http://tiktokfrance.fun/is_taco_bell_the_healthiest_fast_food96e1k.pdfIn PDF document text
    • http://epipog.com/vusedumapunmoswp.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxarogajib/ihheBDu/fox_deportes_directv.pdfIn PDF document text
    • https://cdn.sqhk.co/fujalapevame/jgg7jcL/auto_answer_whatsapp_iphone.pdfIn PDF document text
    • https://megojame.weebly.com/uploads/1/3/5/9/135992505/8b36bc290a2.pdfIn PDF document text
    • http://triple-doska1.club/snes9x_android_ps4_controllerbkvts.pdfIn PDF document text
    • http://artyom.guru/sniper_assassin_5_warehousesv3gt.pdfIn PDF document text
    • https://cdn.sqhk.co/dimowitop/ZqhaifI/fajajet.pdfIn PDF document text
    • http://cmbespaceclient.xyz/sepejepurefunenemawuwitex6ltk4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/tozizoxubawajefulazepod.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/darke_bleak_midwinter_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/asphalt_9_play_store_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/play_tamil_movie_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/bt_home_hub_4_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E2 6384 bytes
SHA-256: c3bf22327ac6c4cfad074c19db2a44ca23af8d018e57862fef52acc9e8ef3487
font_01_sfnt_off0000fb6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6D 5004 bytes
SHA-256: f19b99e395db1e192ab147849c59bbdef73dfedc9e73c0d96cdee136278a10ec
font_02_sfnt_off00010c8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8A 10432 bytes
SHA-256: 840de6bf8a00c3c3fd38b7346cec4407115782c8ebee760826a58f038df22c20

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