Malicious PDF — malware analysis report

Static analysis result for SHA-256 12ff431e5792466c…

MALICIOUS

PDF

236.3 KB Created: 2021-06-09 17:34:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a55236437e103f123452079e373c7405 SHA-1: 73471f5048bf0dfd477daa40be077ade48843b9b SHA-256: 12ff431e5792466c0db8f2996131a4392b39e980a9a6cb7b1c6fb05a1e59c206
144 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains heuristics indicating it is a phishing lure, specifically using an SEO redirector to a URL that appears to be related to free downloads. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL is the primary indicator of compromise, likely leading to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://allytemp.ru/pbw?utm_term=the+usos+theme+song+mp3+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4493597/normal_5fd314e9a164a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404503/normal_5fdd2a2ed27da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492253/normal_5fe1f97f2bbb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423454/normal_603a67ab35e41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490371/normal_6014598ab6698.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444853/normal_5fc5a1048c9de.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lavijusana.pbworks.com/w/file/fetch/144657219/61205948103.pdfIn PDF document text
    • http://kuzimotum.pbworks.com/f/contrato_de_arras_confirmatorias.pdfIn PDF document text
    • http://vafakana.pbworks.com/f/how_can_i_get_my_w2_from_my_employer.pdfIn PDF document text
    • http://zezimin.pbworks.com/f/74793448507.pdfIn PDF document text
    • http://fipivuzigoge.pbworks.com/f/best_ps1_emulator_for_windows_10_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ceef9f51-fd39-4619-ab9a-b81ce1e33b3f/how_to_set_woods_outdoor_timer.pdfIn PDF document text
    • http://lewiwebula.pbworks.com/w/file/fetch/144716826/immunity_to_change_free_download.pdfIn PDF document text
    • http://mibegenav.pbworks.com/f/honda_shadow_vt1100_service_manual.pdfIn PDF document text
    • http://xuruzinijub.pbworks.com/w/file/fetch/144423876/slumdog_millionaire_book_macmillan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a151beef-fe92-40a7-b54a-48d41a29398e/73840087366.pdfIn PDF document text
    • http://xetuduju.pbworks.com/w/file/fetch/144555501/niwimeturowedipuluzebi.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_off00035ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35EBE 5484 bytes
SHA-256: 9b836af298d22c8bbdf54623831a7cff72bea1a9829937f6b17010ac2a049f3a
font_01_sfnt_off0003714f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3714F 16016 bytes
SHA-256: bd2dd2e0f422658bdbab6fbaf37735cca2e93582eeb94ca79a45f27d3d0764df

Open this report in the interactive analyzer, or submit your own file for analysis.