Malicious PDF — malware analysis report

Static analysis result for SHA-256 59320ab507475132…

MALICIOUS

PDF

78.9 KB Created: 2021-03-16 16:41:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f924f9acba189d7f01e8ef23cf7456f4 SHA-1: 224727b1dce638e8adc5590230ecf4ea4d080966 SHA-256: 59320ab50747513221b30e436ae44d9942169a5b982ceeb13d236a2467b05588
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded URLs and heuristics indicate it's part of a link farm designed to direct users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or a scam. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to a site offering a fake hack, which is a common lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://lozipotod.ru/wix?keyword=hustle+castle+hack+apk+latest+version PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421213/normal_5fdf16e859666.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393369/normal_602129cf784a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416811/normal_6019bba0b1f5b.pdfIn PDF document text
    • https://xibixijuli.weebly.com/uploads/1/3/5/3/135399677/1014d350284.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372963/normal_5fee7ef982c03.pdfIn PDF document text
    • http://damonesowa.iblogger.org/vans_old_skool_high_white.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419204/normal_5ff079330288a.pdfIn PDF document text
    • https://xazefobilizap.weebly.com/uploads/1/3/1/3/131384081/videdapixunosimu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/b6a89339-ad69-4b6a-b388-22f9e4f481a9/rapajatowelezolafumibu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c32dbaa-64e7-4736-a29c-7eafcbd9dd4b/tc_electronic_flashback_x4_delay_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/dedezunapagesaxegideme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ca0048f-700b-4dd3-bfc2-c9e0e05a3850/how_to_greet_someone_in_latin_america.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93d9491f-caf2-4276-a2b9-7ed5c4af582d/barnett_jackal_crossbow_quiver_mount.pdfIn PDF document text
    • http://bulujulu.rf.gd/dialectical_behavior_therapy_diary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b504396-3ceb-47ac-a5fc-80a364ea9d51/6931824954.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/jifijev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d37f2cb8-fc64-4fcf-9631-060510e052bb/how_to_plant_green_onions_indoors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3ac749c-b016-4ce2-a135-f12a19fdf4cc/how_to_write_anything_4th_edition_ebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b372ac2-34c6-4f9d-bc18-0bd2bf7feab5/pioneer_avic-x940bt_bluetooth_not_working.pdfIn PDF document text
    • http://melewurimepuja.rf.gd/xinobelinukaxoxiburi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ced58a2-200e-482d-844e-62daebf5ee2b/25198233468.pdfIn PDF document text
    • http://sulijik.rf.gd/next_garmin_release_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c14ebe42-64b8-4e83-8426-f62a7eb6ede6/89407477470.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_off0000eba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA8 4988 bytes
SHA-256: 414a7a76ca3419518b2ddd28fd0c88cf4e487fc40e273313212b9640b3d16b2b
font_01_sfnt_off0000fc93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC93 10260 bytes
SHA-256: 0996efda587c871d1a728986161eb509063a2030ecf75929f83dae6653ade58e
font_02_sfnt_off00011fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FBD 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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