Malicious PDF — malware analysis report

Static analysis result for SHA-256 f18e6e7dfe63a3d7…

MALICIOUS

PDF

72.5 KB Created: 2021-03-08 17:13:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: dd50a288c04833c1b013596af86251a3 SHA-1: 49d5a4eefce5ef985291edf8a4ef05797124dad8 SHA-256: f18e6e7dfe63a3d767ad7d3108cd394663685f598c4c8273296dcf55285e572d
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a link farm, with the primary URL pointing to a suspicious domain. ClamAV and ML classifiers strongly indicate maliciousness, specifically a phishing trojan. The document's structure and embedded links suggest an attempt to redirect users to potentially harmful websites, possibly for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/award?keyword=acrylic+color+mixing+chart+pdf PDF link annotation
    • https://cdn.sqhk.co/rudolikube/gdjcrkg/military_sounds_of_silence.pdfIn PDF document text
    • https://cdn.sqhk.co/nabowixufori/geu2jjB/whatsapp_video_love_new.pdfIn PDF document text
    • https://darifojiwuz.weebly.com/uploads/1/3/4/5/134588766/fanejana_kitojiv_gununalubakolar_luviw.pdfIn PDF document text
    • https://fojuxiwo.weebly.com/uploads/1/3/2/6/132695505/8664335.pdfIn PDF document text
    • https://ratopavitakam.weebly.com/uploads/1/3/4/4/134460251/nulepaxativem-rotanijubuwob.pdfIn PDF document text
    • https://cdn.sqhk.co/zedozomi/gdsieje/sketchbook_draw_and_paint_app_download.pdfIn PDF document text
    • http://sutivetowit.mypressonline.com/memijatida.pdfIn PDF document text
    • https://cdn.sqhk.co/golemejexeno/hg7Bzha/47350785884.pdfIn PDF document text
    • https://cdn.sqhk.co/pomoliwekag/UWvejhe/wifi_scanner_app_android.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/sasufufa/ratukerakixivofag.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/pawizukopifadu.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/my_friend_dahmer_dad_actor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a60e44d4-9e92-41a7-b286-fc6ca180ac35/weber_smokey_mountain_smoker_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e99499c-bdfe-4231-a55c-1c9e2ddf55ab/jupapi.pdfIn PDF document text
    • http://kulebosux.myartsonline.com/how_to_get_abs_and_chest_at_home.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18dfbe97-7964-4ffa-9a1d-1225635ceea8/rinilavanixesa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8305773-dc68-4621-b3e1-8e6fbc5cedde/will_kidde_and_first_alert_compatibility.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b43f7145-fbba-488c-8b36-3b84f9021f06/1659350815.pdfIn PDF document text
    • http://manuwakagekewu.onlinewebshop.net/8_steps_in_ethical_decision_making_model.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/xavalotulunodebilo.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/gmat_official_guide_online_free.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_off0000dfa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA6 5552 bytes
SHA-256: f6114e6e03aae7a2b30275324870bf8b855a31b9061e34b565f6e3c9c65cc9d8
font_01_sfnt_off0000f26c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26C 10112 bytes
SHA-256: 0036b1385d5e74bd41c8d068b6fbee80e563dad366df4000f98d5d6ce8e2ca0f

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