Malicious PDF — malware analysis report

Static analysis result for SHA-256 e71fb13817880add…

MALICIOUS

PDF

74.7 KB Created: 2021-01-28 09:02:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 44bc79833adde07f2ef7f2b9bcc26b41 SHA-1: f9aa2c5316b5edc4f14fd7c84632c1447cf3e8fa SHA-256: e71fb13817880addb72763fba3d7a1d165b4b6e3d761429d5df6be2d2be8bce4
194 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a significant number of external links, many hosted on disposable domains, indicative of a link farm designed to redirect users to malicious content. ClamAV detection and ML classification strongly suggest this PDF is malicious, likely serving as a lure for phishing or malware delivery. The embedded JavaScript, though not fully analyzed due to obfuscation, is a common component in such attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://trafffe.ru/wb?keyword=the%20tiger%20rising%20read%20aloud%20chapter%205 PDF link annotation
    • https://pofifeluvoka.weebly.com/uploads/1/3/0/7/130739131/4682458.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/M9Bjc9z/gewijezudirogekusokisig.pdfIn PDF document text
    • http://ecoterritory.store/banuzek2rgsh.pdfIn PDF document text
    • http://usersdeviceprotectionservice.site/the_dictator_charlie_chaplin_final_speechoxmeg.pdfIn PDF document text
    • https://cdn.sqhk.co/dufelogaruf/gcFzigc/37497161141.pdfIn PDF document text
    • https://rakawixedisika.weebly.com/uploads/1/3/5/3/135324789/pasafonejinulo.pdfIn PDF document text
    • https://gupapuna.weebly.com/uploads/1/3/4/7/134726568/d5998f.pdfIn PDF document text
    • http://brandframeb.com/triominos_deluxe_regle9r7my.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383571/normal_60079f429d4d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457320/normal_5fed10d8d5a04.pdfIn PDF document text
    • https://tiparopodewab.weebly.com/uploads/1/3/5/3/135340776/gemewuwezotepe.pdfIn PDF document text
    • https://cdn.sqhk.co/sadebupunen/jdgfbji/dragon_village_m_egg_codes.pdfIn PDF document text
    • https://cdn.sqhk.co/gubisagebuto/n6ig3jg/11486985603.pdfIn PDF document text
    • http://wiregabjuk.fun/67490639116w18d0.pdfIn PDF document text
    • https://zemokozovoxepuj.weebly.com/uploads/1/3/0/7/130776726/xowuvatonufiz-babufirilabazo.pdfIn PDF document text
    • https://bisojobiregabo.weebly.com/uploads/1/3/4/5/134509607/xukeka_puvujirov_nalesa_zanaguxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477637/normal_5fe6aa3b822b3.pdfIn PDF document text
    • http://cosmicgig.com/toy_blast_hile_apple7tmhl.pdfIn PDF document text
    • http://fumigatoff.online/xabinum788n.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE802 5408 bytes
SHA-256: cc601f0c4975b7bbafa6e24d4e91128c57861659412722fe0ad3c2cab548efd3
font_01_sfnt_off0000fa64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA64 10356 bytes
SHA-256: 2ff3118e8e12ee286e7457cbceed900193b011a44088612e88ecd97a1ca8eda9

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