Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d29f6e82f6e8694…

MALICIOUS

PDF

76.7 KB Created: 2021-02-11 17:42:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 27025f33f2f6e1c1ae4bec26537ea5ca SHA-1: 90c8a73bd4b06fb0038c2da311752e0960866999 SHA-256: 1d29f6e82f6e8694aefa9033c4bcf2282fa306bda3881fd6231129e6d470e640
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, which is a common tactic for SEO manipulation or directing users to malicious sites. ClamAV and ML classifiers strongly indicate malicious content, specifically phishing and trojan behavior. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://bologen.ru/123?utm_term=word+crush+cheats+variety PDF link annotation
    • https://cdn.sqhk.co/wituruxa/frXL6gg/xikuxokomowu.pdfIn PDF document text
    • https://cdn.sqhk.co/jagawubu/iTYEheT/pokowesulivepigadusa.pdfIn PDF document text
    • https://cdn.sqhk.co/vefapatape/jcAijii/como_usar_a_maquininha_mercado_pago_point_h.pdfIn PDF document text
    • https://jukejifoka.weebly.com/uploads/1/3/5/3/135311866/papifujovunuma.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/6ih5igl/gatalaleb.pdfIn PDF document text
    • https://weduparazibad.weebly.com/uploads/1/3/4/7/134710999/a2a0926209.pdfIn PDF document text
    • https://cdn.sqhk.co/rawerusiwala/LOiaXij/49940684973.pdfIn PDF document text
    • https://wosuletoxo.weebly.com/uploads/1/3/0/7/130739711/vularuwanaluna-puboferanev.pdfIn PDF document text
    • https://cdn.sqhk.co/sebixodof/bLihicl/71031366031.pdfIn PDF document text
    • https://cdn.sqhk.co/nopusixinid/ehi7PEp/design_my_room_online_free_games.pdfIn PDF document text
    • https://vikenefimedok.weebly.com/uploads/1/3/4/3/134390201/pewakavokoxebekorul.pdfIn PDF document text
    • https://cdn.sqhk.co/sakixowofeg/digngjg/84381762462.pdfIn PDF document text
    • https://cdn.sqhk.co/nejajevafode/ijicuje/hello_neighbor_act_3_escape.pdfIn PDF document text
    • https://cdn.sqhk.co/vujagefamig/Tjdrehf/plague_inc_game_parent_review.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/mhjigYp/alien_blackout_gameplay_no_commentary.pdfIn PDF document text
    • https://cdn.sqhk.co/roretuduva/gegISxD/jaruronemeseruralowugis.pdfIn PDF document text
    • https://kufudazasa.weebly.com/uploads/1/3/4/6/134626120/3269671.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/bezutu/saltwater_blenny_information.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_off0000f146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF146 5172 bytes
SHA-256: f451603402b092e8f593181fd4812f9775bf92b399d8113c5b0be25b86394df5
font_01_sfnt_off000102ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102EE 10208 bytes
SHA-256: f6b131bf72784016a434b008fb6a779209fcfe045675d31bf74231645af33499

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