Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd986705da96be22…

MALICIOUS

PDF

76.8 KB Created: 2021-03-11 15:29:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bba5e3b6ca7a63c762127361085100dd SHA-1: e45258fc036b80e5daf55d53a861a4da1a6f3685 SHA-256: bd986705da96be228132ab63712662da723beb8d5124f9bcfe092b3177ef0764
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 0.9998

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://botokaw.ru/strik?utm_term=starcraft+2+nova+covert+ops+crack+status PDF link annotation
    • https://cdn.sqhk.co/nusideja/aoBvij8/valentine_tic_tac_toe_svg_free.pdfIn PDF document text
    • https://cdn.sqhk.co/xolovagi/fhaeUsY/aimpoint_pro_battery_cap_strap.pdfIn PDF document text
    • https://cdn.sqhk.co/subesanodag/gj4droX/gitutiximaziv.pdfIn PDF document text
    • https://cdn.sqhk.co/didirepakavi/jhFfgei/spelling_bee_free_ipad.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/zhajbnj/bofogodoxaxewega.pdfIn PDF document text
    • https://cdn.sqhk.co/wirowanorax/hfdjdid/30114806140.pdfIn PDF document text
    • https://cdn.sqhk.co/palugalanivo/jnsCpCx/66186737842.pdfIn PDF document text
    • http://pazadixokumox.sportsontheweb.net/behind_closed_doors_telenovela_actors.pdfIn PDF document text
    • https://cdn.sqhk.co/mewivupa/gjcgcfH/car_panic_alarm_sound.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/gozifep/wowabevejofojunabaxoted.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/17338090142.pdfIn PDF document text
    • https://3633ae4e-9acc-45df-885e-1bfa1481cb44.filesusr.com/ugd/e73054_a84bb4246eca434fa17be625aaf27595.pdf?index=trueIn PDF document text
    • https://af431a04-9ebc-4ea4-a98d-45e4ffbfad14.filesusr.com/ugd/485053_f0347799ac364b8284ab1f4c778e93f4.pdf?index=trueIn PDF document text
    • http://furunes.onlinewebshop.net/gameshark_cheats_pokemon_ruby.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/nice_quotes_on_life.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd577d17-944f-4829-a7cc-98cde4fff838/ideas_for_icebreakers_for_virtual_meetings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb949bb4-ce83-42aa-9591-85671a435d30/ionic_compound_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/57890763185.pdfIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_ff87cf10d89145b6a44efcd843d1544f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/45912217011.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF85 5336 bytes
SHA-256: 27010c3afa01e3269465affd5bbc4644b8554c7ac8662194b8544bf36deba2d4
font_01_sfnt_off000101cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CC 10308 bytes
SHA-256: 87c67292e194352b107ed8c06c4d939814ebb01d561a954e8133f6c98df9c4c0

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