Malicious PDF — malware analysis report

Static analysis result for SHA-256 bce9ff4ddd1fb439…

MALICIOUS

PDF

78.5 KB Created: 2021-04-05 09:57:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f4f80ca438c938c827cfa2f0dce73cda SHA-1: 12bc1041ce17d1080f0df2a2f177e55d4400ef90 SHA-256: bce9ff4ddd1fb439d94f02d5bfc3a53eebd576e12976620817bb9971d3c65a92
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/123?utm_term=dark+blue+gradient+background+free PDF link annotation
    • https://cdn.sqhk.co/kuwusemob/Cnjdbf2/international_marketing_notes.pdfIn PDF document text
    • https://filukekab.weebly.com/uploads/1/3/4/4/134478490/625731.pdfIn PDF document text
    • https://cdn.sqhk.co/bebetirifam/2jachaa/57597151588.pdfIn PDF document text
    • https://cdn.sqhk.co/kepozote/he4Xgeh/tic_tac_dough_game_show_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/jebixusugak/siaqphb/20884993923.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/hgriaD5/off_road_bike_ride_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/zatufora/gihaAs0/50th_birthday_party_themes_for_husband.pdfIn PDF document text
    • https://zapedumukovig.weebly.com/uploads/1/3/0/7/130775012/jagoveninus-zoxejuwezebe-tufajunidivej.pdfIn PDF document text
    • https://minojesifivu.weebly.com/uploads/1/3/4/8/134860027/zofelufawafinifik.pdfIn PDF document text
    • https://cdn.sqhk.co/rufebumu/d5wgcFh/metatatizaripigoveliwulit.pdfIn PDF document text
    • https://cdn.sqhk.co/rojisixel/fihsgh4/36610129920.pdfIn PDF document text
    • https://loxufezikuwudi.weebly.com/uploads/1/3/4/6/134687227/fb5e303595a42.pdfIn PDF document text
    • https://nelugawoteraxum.weebly.com/uploads/1/3/4/7/134707069/2605788.pdfIn PDF document text
    • https://cdn.sqhk.co/pulazapusaw/EhdDxgj/switch_scanner_apk.pdfIn PDF document text
    • https://latobebesat.weebly.com/uploads/1/3/5/9/135993630/laludomoninonej-kubakogalerag.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/1796db93-68f3-4fce-9ef9-e4617bcfe2db/1067919706.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/10423949227.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7a8091d-7d69-469b-9b4f-2c476dc7c3a0/golds_gym_trainer_430i_treadmill_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06f565b0-cb61-45b6-85e1-1790c3bcf88a/what_is_the_cost_of_stairlifts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bff0f624-4942-497b-b724-b3840400f547/wufapevafiro.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/megoboserideg.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/iliad_investor_relations_annual_report.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_off0000f3ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CA 5212 bytes
SHA-256: b1004796f3cda2c8e1ffea0abcb282f2a8fe722d9ea4dbf4a23525a0571ed54b
font_01_sfnt_off0001059e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1059E 11368 bytes
SHA-256: f3ea1791174298636bf288e023a7fda7956228cb14b6a392575375cf535cf35e

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