Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e963acd061588f0…

MALICIOUS

PDF

74.2 KB Created: 2021-04-01 05:59:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: eba062efa86548335b96e5e0838b0bc5 SHA-1: c576e8b359f8717b2293d2d1642056da25b301a0 SHA-256: 3e963acd061588f054cbe68c12f3259c79b253efbfa2b84836901763bb600e53
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/award?keyword=pan+card+affidavit+format+pdf PDF link annotation
    • http://pemufosapakem.mypressonline.com/phylum_annelida_notes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479678/normal_60647c5c9776d.pdfIn PDF document text
    • http://betizekaxu.getenjoyment.net/asus_m5a97_plus_usb_3.0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466411/normal_605f9d3950372.pdfIn PDF document text
    • https://lavabowigu.weebly.com/uploads/1/3/2/6/132682694/a528d2cb782f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428061/normal_602af43f94659.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422161/normal_5fe843b6e2917.pdfIn PDF document text
    • https://jaloteke.weebly.com/uploads/1/3/4/0/134096083/fipive.pdfIn PDF document text
    • http://jidudilubad.mygamesonline.org/82960956688.pdfIn PDF document text
    • http://xejepurefe.scienceontheweb.net/30748911244.pdfIn PDF document text
    • http://rujisuki.mygamesonline.org/white_christmas_tree_ornament.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447273/normal_5ffa9346469f4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e1ad5af-d8c2-49c5-b772-e8a45c625eaa/what_is_free_cash_flow_yield.pdfIn PDF document text
    • http://zisukuvi.atwebpages.com/38852933386.pdfIn PDF document text
    • http://wobanunep.myartsonline.com/63917718173.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5606c25b-57d7-4ae2-b5de-2395a07e5071/kenmore_elite_glass_top_stove_cleaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7876a3c-837f-4608-aa15-94e7f362c65a/fallout_new_vegas_cheats_perk_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44b8bd3f-2ab0-4e2a-b4ab-b44829393602/how_do_i_cancel_a_walmart_grocery_pickup_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f88724ca-8d91-4f43-89ec-6776af60f648/nevabedupafijewesopurene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e511cba-15d0-4d27-b50c-ae023f465de6/takugumikigafut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7a696a1-ed71-4f3f-ac49-f0a3d1bee38b/the_last_lecture_egypt_movie.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_off0000e668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE668 5152 bytes
SHA-256: 4759ba235df58ca54c2d16ba22b6b4ccc2cb6e0a4e5b1e10ebc10a0509f319d4
font_01_sfnt_off0000f7e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E7 10408 bytes
SHA-256: c5a719415d5d34b84cb72694f788b71342b7df193e1bcec5d6f92853a1d4a904

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