Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec9b6996544a6d2e…

MALICIOUS

PDF

67.9 KB Created: 2020-11-20 08:31:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0566cdbfd424cb6c7c754b5f518d9115 SHA-1: 1fb22b7c366ba7af87773a03b3b899eea5ef54e7 SHA-256: ec9b6996544a6d2e2bf4c1a311c226777a36c8aa1bb675ab358efb1074d6df41
184 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, appears to be a lure related to 'Q connect labels', suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffmen.ru/aws?utm_term=q+connect+labels+16+per+page+template
    • https://finiluxexolije.weebly.com/uploads/1/3/1/8/131856594/xituxojelamew.pdf
    • https://nifufoji.weebly.com/uploads/1/3/4/4/134458522/mixogudaremu-xidobavej-lodaraf-wajeb.pdf
    • https://rewemekekebaz.weebly.com/uploads/1/3/1/4/131406535/6ad8e6d83e227.pdf
    • https://dedeluruxizo.weebly.com/uploads/1/3/4/3/134305162/tozogiwar.pdf
    • https://sanuvexugivi.weebly.com/uploads/1/3/1/6/131606490/2986215.pdf
    • https://majubatu.weebly.com/uploads/1/3/4/2/134265851/393689266d950b.pdf
    • https://sawalodisixujig.weebly.com/uploads/1/3/4/4/134490012/1160974.pdf
    • https://seririgikum.weebly.com/uploads/1/3/0/7/130739922/datakug-vikaki.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fosawef/sisopulimakoderewozab.pdf
    • https://uploads.strikinglycdn.com/files/57a50dcd-fda6-4b9e-a44f-c2e37005d8d4/92939090578.pdf
    • https://s3.amazonaws.com/zufojadibi/peput.pdf
    • https://s3.amazonaws.com/podawakumepewez/moranavivomevak.pdf
    • https://uploads.strikinglycdn.com/files/236d13fa-0a3e-4bd3-aaf3-de159bd1bdbf/sadirufasa.pdf
    • https://s3.amazonaws.com/purawuma/order_of_terri_blackstock_books.pdf
    • https://s3.amazonaws.com/xozeb/va_cash_out_refinance_guidelines_2017.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8c3.bin
4b000e16beb9b5acef705246cf85cb9c7bed4c669c61c4ed7acc52e559df8935		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C3 5660 bytes
font_01_sfnt_off0000dbed.bin
86b35a5853eb5d71cb5d146569b488680f763be972e239326670e01102562b99		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBED 11300 bytes

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