Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5c67c143efffb96…

MALICIOUS

PDF

74.8 KB Created: 2021-03-20 11:29:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 34b1632ad785c71c014c6172a6d1cf0b SHA-1: 559566df4b96731614af4f036e1771bdbb11742b SHA-256: d5c67c143efffb9653743b0d5e63c6418e901021c035a56afa70177daf8f12c7
166 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. It uses a password-protected-archive lure. 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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://bologen.ru/wix?keyword=roblox+account+passwords+with+robux PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424347/normal_5fd6152c97a78.pdfIn PDF document text
    • http://storergoods.site/can_you_heal_your_body_with_meditationythb3.pdfIn PDF document text
    • http://zoomita.fun/34093403103r33sm.pdfIn PDF document text
    • http://lodomujimujug.mywebcommunity.org/simmons_rangefinder_battery.pdfIn PDF document text
    • http://verifybadgesbusiness.com/ferawinesesetemumukov98qd7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368249/normal_60023724cffda.pdfIn PDF document text
    • http://siwivelijutore.medianewsonline.com/louisville_slugger_black_flame_pitching_machine_video.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4fbc56e1-d9a2-4996-be1d-38f9cd263936.filesusr.com/ugd/b1afee_11280e280bbd46ea8defe87c2bf77088.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xulikamul/midnight_sun_story_review.pdfIn PDF document text
    • https://931f52e6-cb68-4a93-8e02-54808d33f8b6.filesusr.com/ugd/6290de_5151a090ecf64ee9b3602a8931a5792b.pdf?index=trueIn PDF document text
    • http://dolanuvusipegu.myartsonline.com/somebody_something_anybody_anything_nobody_nothing_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/inferences_worksheet_7.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/fapatogel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edf5e8cc-635b-42ac-84a0-70d5750375e7/how_much_is_disability_support_pension.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/beko_glacier_fridge_freezer_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2ca025e-3d8c-4979-bdf5-c49254b8e063/dapofogapuju.pdfIn PDF document text
    • https://6d4cd3b7-91e9-43ac-92b9-205473f1e50d.filesusr.com/ugd/28146e_8cfbd7365bfc4643b3b04a0305ab01d3.pdf?index=trueIn PDF document text
    • http://japinoxizidunub.myartsonline.com/what_does_the_word_sun-dappled_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/91691304513.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 8

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_off0000e746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE746 5468 bytes
SHA-256: 2a353ba9b55c6b9ae0d678a113ee1ba6fd07dd7962b86247e253a6c98bb9cb9a
font_01_sfnt_off0000f9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EE 10652 bytes
SHA-256: ac3db8c031cd65aa09d1a7a077224695319db70180524dfd0e5f208f6cbd44cb

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