Malicious PDF — malware analysis report

Static analysis result for SHA-256 6874e9f8557ef208…

MALICIOUS

PDF

78.0 KB Created: 2021-03-13 17:39:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 00b3a345069e5c6cb0d7272db854ffbe SHA-1: 9dafbcba30b4c0d6a20802bb06f31bacc78daf28 SHA-256: 6874e9f8557ef20841858f7d39f0103e2494a5acca38a87a228501e54664d60f
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the presence of numerous unknown URLs suggests the document is designed to redirect users to malicious sites, likely as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • 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://xajibur.ru/123?utm_term=badrinath+movie+dj+songs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368467/normal_60198526722c8.pdfIn PDF document text
    • http://defokozixeral.sportsontheweb.net/apollo_addressable_smoke_detector.pdfIn PDF document text
    • https://kukevukoleguko.weebly.com/uploads/1/3/4/2/134265740/nopagurawejilo-toratejasun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420748/normal_603ffacb7d22b.pdfIn PDF document text
    • https://susotavawo.weebly.com/uploads/1/3/5/3/135325365/6784844.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371498/normal_5ff40e768fd1a.pdfIn PDF document text
    • http://wasegulom.mygamesonline.org/56638659549.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/aleko_gate_opener_installation.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460060/normal_5fd60d05ba155.pdfIn PDF document text
    • http://raxewaponoxiv.mygamesonline.org/81603218142.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371808/normal_604cc98bc6ce1.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/pojimawujelelobama.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372076/normal_5ffb4da2c2005.pdfIn PDF document text
    • https://rujasuxok.weebly.com/uploads/1/3/1/6/131606047/rugirazerigiminiba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385848/normal_5ff2220333d59.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/feseni/google_sheets_date_format_default.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/what_is_the_maximum_you_can_win_on_tipping_point.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/tibiwuvopogux.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/saitek_x52_pro_profile_dcs.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/how_many_reps_for_neck_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/bibia_be_ye_ye_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/firmware_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/envision_math_grade_3_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/30280235631.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_off0000f2dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DC 5392 bytes
SHA-256: e15f62f8a486ae00961bc77ca8049015c7ca9389126e8cb1aee765133feddc92
font_01_sfnt_off00010516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10516 11080 bytes
SHA-256: d91b6c022301c1fc4323fbdeeadea3c5f51d06f1d7323ba74ecfd2d7011adf43

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