Malicious PDF — malware analysis report

Static analysis result for SHA-256 665ba968c73c7763…

MALICIOUS

PDF

90.9 KB Created: 2020-11-10 05:42:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61282228f90623adc724c60be21f77df SHA-1: 71dc1c05b1a4f28094c574e6b94b72986ab1cbbd SHA-256: 665ba968c73c776300b99204b3bf5752c452be5e353ccd2c28e8d188e23b1854
214 Risk Score

Malware Insights

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

The PDF contains embedded links to known malicious redirector infrastructure, disguised with SEO-friendly keywords. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The document body, though heavily obfuscated, contains keywords related to Xfinity channel guides, suggesting a lure to trick users into visiting the malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gettraff.ru/strik?keyword=xfinity+channel+guide+sarasota+florida
    • https://cdn-cms.f-static.net/uploads/4369504/normal_5f8b612f124b4.pdf
    • https://cdn-cms.f-static.net/uploads/4366374/normal_5f878566714a8.pdf
    • https://gewupokisata.weebly.com/uploads/1/3/4/6/134606569/3448116.pdf
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/wivorajum-segugosivupor-jojiwakunulubob-ridituva.pdf
    • https://cdn-cms.f-static.net/uploads/4421969/normal_5f9d2bfdedda6.pdf
    • https://cdn-cms.f-static.net/uploads/4366357/normal_5f9e5662adc1e.pdf
    • https://cdn-cms.f-static.net/uploads/4408001/normal_5fa0749e40951.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a4a03115-536c-428b-8e7f-5c9e40c2279c/62163765621.pdf
    • https://uploads.strikinglycdn.com/files/a9f372a2-cb1c-4ad6-badf-3c8bebc36bcf/assamite_vampire_masquerade.pdf
    • https://s3.amazonaws.com/fovezewi/diseo_de_bases_de_datos_relacionales_adoracion_de_miguel.pdf
    • https://uploads.strikinglycdn.com/files/fcf90f3d-9c1c-44ee-9a4e-6e55d6af4163/5638587108.pdf
    • https://uploads.strikinglycdn.com/files/4ee240dc-8623-41f9-a726-5c3e7463ccc9/dakogamigolomumobufut.pdf
    • https://s3.amazonaws.com/dixaleko/femokitit.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00012e7b.bin
121dae2360bb2f18198f27d2d410cbf77e342900d9e0a6747eda6feb3b2a5f23		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12E7B 26568 bytes
font_00_sfnt_off0000ef0b.bin
2b13ec0859b4a0e46e5ccdf40761d73117e83249bc4fd1b1d50260596edd61c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0B 5364 bytes
font_01_sfnt_off00010148.bin
ffbc680586aa73999e9cbb90253bb3d922e3f517d8afa4dbef4112389418412d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10148 1736 bytes
font_02_sfnt_off000109cd.bin
bceeed343cee229958346ea636415ee72f2e3ea4ebfc6c27307c4770710e69b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109CD 10764 bytes

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