Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2651be7859cf4e2…

MALICIOUS

PDF

70.8 KB Created: 2021-06-07 20:28:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: d14fa6782bb318f8509712a483bbc6bf SHA-1: ca56163ea83c27de161a9ad9bba9b3a0476daf4a SHA-256: f2651be7859cf4e20f5b10dd9ac559febbdbe421742071750733b25130704493
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF that contains an external URI and an SEO redirector link, both pointing to the same URL. This indicates a phishing or scam attempt, likely to trick users into downloading further malicious content. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, but the presence of a redirector URL is a high-priority indicator.

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
  • 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.
  • 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=tablas+de+distribucion+de+frecuencias+ejercicios+resueltos+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4460709/normal_60063e015ec7f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468534/normal_5fe2292b7ebb3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405651/normal_5ff86cae8cd0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417648/normal_605f371fa3eea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483345/normal_600af57e78489.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387061/normal_5ffd37fc582dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421781/normal_6054aef0bfe72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489609/normal_600c0f7388ceb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409107/normal_60150ddc82a2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420924/normal_605dc339d67e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413226/normal_601d15101da44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368768/normal_5fd14a31d2ab3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466143/normal_603baf748ebb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422622/normal_606e6bc9b33a9.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/f83c3df6-dfa1-4c16-b467-8d25ae6dce55/ipad_user_guide_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c0f8f60-6ee6-435b-bc73-b1c693b68d7e/ariens_snowblower_carburetor_bowl_gasket.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c7b8128-0424-48b1-b5a6-6a1c9a7804b7/fifty_shades_freed_film_synopsis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51df26ee-a69c-4dec-8350-740ecf7f40d6/gerowaxebupizerofa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c8ac311-7ad4-46b7-83e1-481bd1811139/kuzibenurixiwubiki.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 4

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_off0000d6cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6CB 5316 bytes
SHA-256: 0d9a8552eb0822a42e831e0df74352b8e7335de97ecfbb349a6e6756270d76ca
font_01_sfnt_off0000e8eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EB 11128 bytes
SHA-256: 2e6a9ccf589758843c785d96ab838c39f7e472010963d0cefb90cbbc3533d8a4

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