Malicious PDF — malware analysis report

Static analysis result for SHA-256 0884d25e6651cc7d…

MALICIOUS

PDF

78.6 KB Created: 2021-05-17 22:44:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2d6644c06fd2252a468b496e05d1d8ec SHA-1: 140cc62cca0a29d7def0551888ddcd21b526509e SHA-256: 0884d25e6651cc7d7787450f61921b2553c33340881f6a3db07e88f064549188
156 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 5

  • 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.
  • 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://zajinet.ru/strik?utm_term=stihl+ms+170+shop+manual PDF link annotation
    • https://mamufitixiru.weebly.com/uploads/1/3/4/6/134640278/0266b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462075/normal_5fd297360ba9f.pdfIn PDF document text
    • https://fekebejoluxoji.weebly.com/uploads/1/3/4/3/134309121/7153630.pdfIn PDF document text
    • http://pewagupudasita.22web.org/mudizilorokuwumoxoj.pdfIn PDF document text
    • http://jofixumofeti.22web.org/how_to_engage_pto_on_automatic_allison_transmission.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487897/normal_5fd8afe7abe58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470968/normal_6025e0aa44758.pdfIn PDF document text
    • http://gunepevoxop.66ghz.com/xunapafuripumigilaguw.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/87525db6-6999-4857-98fb-ded2511399d4/car_maintenance_checklist.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/reekie_architectural_drawing.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/kaala_koothu_movie_tamilgun.pdfIn PDF document text
    • http://livuwiga.rf.gd/lspdfr_traffic_accident_callouts.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/how_to_install_ds4windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/nilekudalub.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/65741676148.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b59b4256-a835-462c-bc17-a9c337d6cc99/61164101397.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/date-_fns_format_timezone.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/bloons_td_5_free_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b16fa50-3a6e-4f24-9254-9a638c4b7412/how_to_turn_on_quadra_fire.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/35097486253.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_off0000f655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF655 5340 bytes
SHA-256: 4353d3a6c7c3e6496863d36cd7b5fb43662af3b3001ba89e6569c2fb86b8d8d1
font_01_sfnt_off00010863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10863 10904 bytes
SHA-256: fe9902ea1fd4741a47bb34b0bc81262e8126e024261e4f3741e3cc57a4c422bd

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