Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fc221df37915f38…

MALICIOUS

PDF

71.2 KB Created: 2020-12-24 09:19:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1b1a2a1fa963a7f0dc0b9e7885f3e9ed SHA-1: b9941fbed94e1b7d4c21fe401a860a0c78a991a5 SHA-256: 1fc221df37915f38068fe681a807c130038c4072cda02e6b5f42b78dca622a31
194 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 multiple heuristics and a machine learning classifier, including critical detections for a malicious redirector link. The embedded URL points to a known malicious redirector infrastructure, likely intended to lead users to a phishing or malware distribution site. No scripts were extracted, but the PDF structure and heuristics strongly suggest a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?utm_term=wrecking+ball+by+miley+cyrus In PDF document text
    • https://cdn.sqhk.co/toralapiluw/ejcwrNw/dodoretezodijepu.pdfIn PDF document text
    • https://cdn.sqhk.co/tewisifupib/haTaN3V/musiforemufenikarilanux.pdfIn PDF document text
    • https://cdn.sqhk.co/nutakurij/J8wZigc/du_application_portal_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/gogoturowib/sjj6gdP/54958793981.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mavixu/wefazakakanute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a062d2f6-ed80-4e59-b48d-3c75ace89749/11517924784.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/element_compound_mixture_pure_substance.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/dumirebawi.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/sol_du_2018_date_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0bc8348-6af1-4f04-badc-88ed0f786bdc/oracion_a_jesus_de_nazaret.pdfIn PDF document text
    • https://s3.amazonaws.com/madegusulepugif/the_furies_of_calderon.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/bucor_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/annadammula_anubandham_songs_naa_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/adverb_clauses_exercise.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 7

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_off0000d193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD193 5128 bytes
SHA-256: f46e8809a1200755b40a7359c0dd802e2b5150db2655f1fd01e060e9a762dd97
font_01_sfnt_off0000e2f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F1 9004 bytes
SHA-256: 78fb044daa1ffe679bd451b962b80b3061d4247c975151a03ff425be02b82768
font_02_sfnt_off00010187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10187 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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