Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f9b28e1ed9506c0…

MALICIOUS

PDF

71.3 KB Created: 2020-11-20 12:51:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ab699bad99f49dd2ff282f862fe6baa SHA-1: b39b7387a38c496e80983909ca509ff653cd5d29 SHA-256: 6f9b28e1ed9506c05ec91bfbc66a87b65c983e19725f7830533590f74a784c34
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to 'Iowa hawkeye football schedule 2020 printable', suggesting a phishing or scam attempt. The presence of a malicious redirector link and the ML classifier's high confidence score indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=iowa+hawkeye+football+schedule+2020+printable
    • https://pixumoxijabana.weebly.com/uploads/1/3/4/7/134748481/1772faede34bb4a.pdf
    • https://polaposegit.weebly.com/uploads/1/3/4/5/134591324/goroziz.pdf
    • https://wowumasoz.weebly.com/uploads/1/3/4/3/134310839/moxiwozubir.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xamibudasagas/75441273286.pdf
    • https://s3.amazonaws.com/rezugekolaba/goxorogebowedezawe.pdf
    • https://s3.amazonaws.com/sifawekujiki/bosch_classixx_dishwasher_manual.pdf
    • https://uploads.strikinglycdn.com/files/0745c256-a66a-4259-a706-44fc30ff1b60/beverage_air_mt27_evaporator_coil.pdf
    • https://s3.amazonaws.com/pusori/takibudibe.pdf
    • https://uploads.strikinglycdn.com/files/40055c82-4475-4ed3-ab51-9dd43dbad2eb/duxaj.pdf
    • https://s3.amazonaws.com/leguvefu/natinodalojijotegivem.pdf
    • https://uploads.strikinglycdn.com/files/3f1c73f0-8935-4c27-96d4-ae696fee12ba/federal_rules_of_evidence_104.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd69.bin
d97e2602597dca8e7a6e77ce9b62b35fac1532466d92898a80d6c76fb6da00b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD69 5852 bytes
font_01_sfnt_off0000e161.bin
6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE161 3720 bytes
font_02_sfnt_off0000ecc4.bin
8221f5cf4a7ea4235002928a4914a326b45720e8f7daf74ffce6fa2fc2f99ebd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECC4 10260 bytes

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