Malicious PDF — malware analysis report

Static analysis result for SHA-256 782ab85f96dec78f…

MALICIOUS

PDF

66.4 KB Created: 2020-12-15 17:54:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3afe89c7beccc74445842e57160f7710 SHA-1: 56e9375f6582253923c18522fed7f3b2503fab49 SHA-256: 782ab85f96dec78fee82af4dd40d9b0e7712e1449242ba19f51c472538ad599c
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'https://traffmen.ru/123?utm_term=memphis+zoo+pandas+2018'. This URL is likely used to direct users to a malicious website for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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
  • 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/123?utm_term=memphis+zoo+pandas+2018
    • https://noxagutut.weebly.com/uploads/1/3/4/4/134483949/88e26.pdf
    • https://nonokutofukidob.weebly.com/uploads/1/3/4/8/134872148/5052314.pdf
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/zamepagamejoxer.pdf
    • https://cdn-cms.f-static.net/uploads/4460686/normal_5fa51d6d87c94.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc133802cf09257bd6dffa3/t/5fd1fd01ef89ac66837b19a6/1607597314348/coffin_nails_medium_long.pdf
    • https://static1.squarespace.com/static/5fc51c9aa87939686423652d/t/5fc6191cf81c9a2a0c741ef3/1606818076649/68933020466.pdf
    • https://uploads.strikinglycdn.com/files/db7b047a-22f0-4738-9262-19e19666f058/download_avengers_endgame_full_movie_onMouseOver--vvv000012v019771.pdf
    • https://uploads.strikinglycdn.com/files/bc33434b-f2c6-4574-9e48-5dd547f41865/gonogupiwakigana.pdf
    • https://static1.squarespace.com/static/5fcf5182665af30590bf3305/t/5fd666fe5b1f6f7539d7c56b/1607886590991/mejukadizaj.pdf
    • https://static1.squarespace.com/static/5fc6f486791da6493f678260/t/5fcd71180ab5d62feb075a36/1607299352490/action_hero_biju_meme.pdf
    • https://uploads.strikinglycdn.com/files/1833a587-1e02-4fa2-aa6c-364bcc452bcf/sinefidune.pdf
    • https://uploads.strikinglycdn.com/files/674706a4-cc37-4bb1-a59b-25cf28de4e5e/copa_de_oro_tickets.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_off0000c73f.bin
a5180535804032065e1451ea5a931c9f1f17a400149c7590fa831122e739f0e8
pdf-font-stream PDF embedded font (sfnt) at offset 0xC73F 5644 bytes
font_01_sfnt_off0000da58.bin
fffe7b5e2e101ed6a1dc5919e403da6b9bed99862ffd875c64832748f1cf7e6b
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA58 10228 bytes