Malicious PDF — malware analysis report

Static analysis result for SHA-256 68c6e7d62401df16…

MALICIOUS

PDF

76.8 KB Created: 2021-02-05 19:02:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 28214c543379989f87148319aa7dbf35 SHA-1: eb4918c1fcb847f3fe9408a070141317d02bfc2e SHA-256: 68c6e7d62401df16461dc5bd03679c1644f453c09de683613ef8e5948828c081
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm designed to improve search engine rankings or distribute content. The presence of a URL related to 'plants vs zombies cheats apk download' indicates a lure for potentially unwanted software. ClamAV detection and ML classification further support its malicious nature.

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://jottigo.ru/123?utm_term=plants+vs+zombies+cheats+apk+download PDF link annotation
    • https://suguturame.weebly.com/uploads/1/3/1/4/131438741/pelugexi.pdfIn PDF document text
    • https://cdn.sqhk.co/fivukidado/ciajagg/guess_the_picture_quiz_round.pdfIn PDF document text
    • https://cdn.sqhk.co/silijebutu/hishcU4/76355307090.pdfIn PDF document text
    • http://gawuguvososu.iblogger.org/90031025877.pdfIn PDF document text
    • http://berkeciftci.net/catskill_daily_mail_obituary_archivespf39k.pdfIn PDF document text
    • https://cdn.sqhk.co/birofinud/iggdSPr/14830109634.pdfIn PDF document text
    • https://begiruxuvasepi.weebly.com/uploads/1/3/5/3/135351124/6853865.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/jji5yib/18222577469.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/nafibanefexex/bizoxonalugebowex.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/free_handwriting_worksheets_for_adults.pdfIn PDF document text
    • http://vomifavub.epizy.com/call_of_duty_heroes_android_apk_data.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/75258219422.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/professional_references_template_word.pdfIn PDF document text
    • http://xojorefalez.rf.gd/zekanejofowewi.pdfIn PDF document text
    • http://dogefifuga.rf.gd/search_video_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/dumewadezovedi.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_off0000eac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC2 5624 bytes
SHA-256: e68bd8baf45cc8a5de4d300e1410233df4029bda5b6d3bd387b37bf16d9d4dd3
font_01_sfnt_off0000fdd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD8 12164 bytes
SHA-256: 5d6838aa1554c8a3d40d1f84fa928db8796f4f3ccaec28095f621e3593bddca4

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