Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e70a35ed5e35449…

MALICIOUS

PDF

68.4 KB Created: 2020-11-13 19:01:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa2916177a6eb9e958ac206cf6404c01 SHA-1: 9d969f1dbef3c668de50078004b69c020f59e6f9 SHA-256: 8e70a35ed5e35449bb377fdbbbb036e1a042b2e9f0e3a7bd989130b168ba5dec
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded URLs and the heuristic firings suggest an attempt to direct users to malicious infrastructure.

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://ggtraff.ru/123?utm_term=hot+wheels+errors+price+guide
    • https://dekobela.weebly.com/uploads/1/3/4/3/134332871/kawafodisoveges.pdf
    • https://bivamotitujodo.weebly.com/uploads/1/3/4/7/134712473/gilafigaruzadu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0485cb5b-c53c-4f21-9cc3-8dfdc506cd0a/sound_of_a_lion_roaring_download.pdf
    • https://s3.amazonaws.com/vexeliku/62610843462.pdf
    • https://uploads.strikinglycdn.com/files/f0391f15-439a-47cf-98b5-95958e59da3b/bevosogoxarojisaxa.pdf
    • https://uploads.strikinglycdn.com/files/28f6f607-af62-4785-9ed5-7171a8ba3cbf/74568964839.pdf
    • https://uploads.strikinglycdn.com/files/eda26e69-c5df-4401-acab-98195f2801f6/79700496762.pdf
    • https://s3.amazonaws.com/megodipewukitoj/maxajo.pdf
    • https://uploads.strikinglycdn.com/files/a7f4ef72-e2ea-4439-9f92-9ab2d8107db7/st_dorothy_glendora.pdf
    • https://s3.amazonaws.com/legenapi/2886861462.pdf
    • https://uploads.strikinglycdn.com/files/1238885e-d4ab-4bbd-8c64-5249cd067341/raisin_in_the_sun_study_guide.pdf
    • https://uploads.strikinglycdn.com/files/9c2b65ad-022d-4e9b-8150-b4c8ed63f037/67244777238.pdf
    • https://uploads.strikinglycdn.com/files/4e5f9207-6e35-47dd-82d2-d916575ee3eb/74037681811.pdf
    • https://uploads.strikinglycdn.com/files/40957f71-a356-4c79-b054-1dc12d4e036a/interactive_dnd_character_sheet.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_off0000ce76.bin
309c6c76c1d35d9b96ed94cebd4f98bf8e4b3a3a3b01b05a3be5a2c66ba6fcf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE76 5176 bytes
font_01_sfnt_off0000e020.bin
7ae880dccc112acffb4033dd7eb49c5c563a1d1976d7afd6c0153defce423289		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE020 10648 bytes

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