Malicious PDF — malware analysis report

Static analysis result for SHA-256 9914da8c4dcc6378…

MALICIOUS

PDF

74.2 KB Created: 2020-12-31 08:39:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 447d5508300bd6fece33db11823bfe6f SHA-1: 65f57487adf9119fff02cfcf66ae15216f6d440d SHA-256: 9914da8c4dcc63787c7d1cb909b26a404018409ebe4e42547110cf63dd2963ae
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to a movie title, suggesting a lure. The presence of numerous external PDF links, including one pointing to a malicious redirector, indicates an attempt to drive traffic to potentially harmful sites.

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.
  • 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/strik?utm_term=action+hero+biju+malayalam+movie+online
    • https://molefagis.weebly.com/uploads/1/3/5/3/135311004/pepiboxov.pdf
    • https://cdn-cms.f-static.net/uploads/4463812/normal_5fbcc6a7d73c0.pdf
    • https://sobopagugakevul.weebly.com/uploads/1/3/4/8/134881985/sujasaxasexumusini.pdf
    • https://cdn.sqhk.co/mawejoxejobe/5jcgeja/ziregapaxawalupapapo.pdf
    • https://jiburivaduvu.weebly.com/uploads/1/3/4/4/134473865/pijulufepovexumog.pdf
    • https://teguvubab.weebly.com/uploads/1/3/4/3/134347924/45742ee3340.pdf
    • https://cdn-cms.f-static.net/uploads/4380213/normal_5f96774823ed2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/097423e4-9e47-4e13-bbcc-9ff922c24241/tadekinimuzul.pdf
    • https://uploads.strikinglycdn.com/files/42d876fc-8594-4555-98f3-929a07d9fe61/meade_etx_60_manual.pdf
    • https://uploads.strikinglycdn.com/files/0a82bdc3-1b2c-4006-ad2b-3d29e598cdcd/bopidinakiwa.pdf
    • https://uploads.strikinglycdn.com/files/18f47fa2-7948-459e-8056-c9565bbcb22f/zugekakudozusaw.pdf
    • https://uploads.strikinglycdn.com/files/45790c4c-bfee-4786-8944-67990a83204b/apple_pencil_grip_hack.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_off0000e6a9.bin
07b0057ccd94efa5df0ba8ab63d8c3a266f4048d80f3ed74f4c3c91fb6b5df7b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A9 5228 bytes
font_01_sfnt_off0000f859.bin
8ff351a851d27e39e2d400a93a0bd043dd2803eba275b1f85df288dfb4255fd4
pdf-font-stream PDF embedded font (sfnt) at offset 0xF859 10304 bytes