Malicious PDF — malware analysis report

Static analysis result for SHA-256 51ee77829f3ea4ba…

MALICIOUS

PDF

87.3 KB Created: 2020-12-30 02:00:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b7f89356ac8015dd89fb0a834bd742ea SHA-1: e3dab712c4534da145b688ad214110f91c912526 SHA-256: 51ee77829f3ea4bac81f80e16b42886777afd3626bb38c33c85c41766a256d68
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or phishing operation. The embedded content, though heavily obfuscated, appears to be related to a 'Dwyane Wade daughter meme' lure, which is a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffking.ru/strik?utm_term=dwyane+wade+daughter+meme PDF link annotation
    • https://gezedasi.weebly.com/uploads/1/3/1/3/131378850/1017385.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410432/normal_5faab51a2bf37.pdfIn PDF document text
    • https://xekijepomi.weebly.com/uploads/1/3/4/5/134508866/b49577.pdfIn PDF document text
    • https://lirujisigibat.weebly.com/uploads/1/3/0/8/130874608/e72ea132b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452385/normal_5fa0ae2e011da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366004/normal_5f98f8f2034a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480749/normal_5fad58f83534c.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/tadib-pepalitegugoj.pdfIn PDF document text
    • https://bizitodavil.weebly.com/uploads/1/3/4/3/134321392/b7b7b77f7f.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/e3e800d6-37d0-4519-b7d3-741c28c52a2d/79361681945.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/file_organizer_diy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3d24674-bbc6-4f50-8360-72e7b72f757e/30524157376.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/bb_racing_mod_apk_cheat.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/19888396688.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F0 5224 bytes
SHA-256: 3c8daddc4920a136b9a19e9198016ba75533da2bd6cdc872ddfd601dd7eeaba2
font_01_sfnt_off0001179b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1179B 6768 bytes
SHA-256: 2beda71350637d724a44ca822950040323e342014df036e5a6167ddd592b1c32
font_02_sfnt_off00012948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12948 11308 bytes
SHA-256: 517afc469f85d3436867d18038ebbb99932e919ff76c3a8bdb679442c8044f89

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