Malicious PDF — malware analysis report

Static analysis result for SHA-256 90360f552818bb50…

MALICIOUS

PDF

73.1 KB Created: 2020-11-18 13:11:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d174471bf364a85ac794d265d53f0901 SHA-1: 7b9b7fa16db2e7ee362619f7a4235ac94e21d308 SHA-256: 90360f552818bb505a999bf21486f33944be57bb73cc08443aa7d265da403d96
214 Risk Score

Malware Insights

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

This PDF file contains numerous links to external websites, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to free movie downloads, a common tactic for phishing or malware distribution. The presence of multiple links and the critical heuristic firings strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/aws?utm_term=bestwap+full+movie+free
    • https://xuduburuk.weebly.com/uploads/1/3/4/3/134323667/memadiferukawuje.pdf
    • https://ledatomonuv.weebly.com/uploads/1/3/4/6/134686063/f85a5a.pdf
    • https://wesojejupeledaw.weebly.com/uploads/1/3/4/4/134446418/9610535.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/cd779282-a328-47c8-83e7-ac35fe0d9132/35706221904.pdf
    • https://s3.amazonaws.com/zesotat/descargar_cantos_lldm.pdf
    • https://uploads.strikinglycdn.com/files/5a197a32-085f-44b8-a698-1dc2c3983e96/bomokebib.pdf
    • https://s3.amazonaws.com/wegemebufojafak/philippa_gregory_books_free.pdf
    • https://s3.amazonaws.com/vukumesoj/percy_fawcett_amazon_explorer.pdf
    • https://uploads.strikinglycdn.com/files/f1911d71-71c5-4cac-a9d1-abfd222629b5/esee_izula_2_vs_esee_3.pdf
    • https://uploads.strikinglycdn.com/files/13b87c1c-a1c0-410c-962b-2875617ed7c5/fepuk.pdf
    • https://uploads.strikinglycdn.com/files/8c2224aa-2cbb-4812-a1c5-88b072191bd2/rat_river_band.pdf
    • https://s3.amazonaws.com/donarepemi/32003603534.pdf
    • https://uploads.strikinglycdn.com/files/ef4af305-d784-4d33-a872-ce9d5dee121d/memopetoluje.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4aa.bin
d16003343330a494849f683958e1c9936a84bcdd3d4570faeeb67eb73bdf6018		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AA 5024 bytes
font_01_sfnt_off0000e5e2.bin
76fdd61715e118e1fbae1e07a2e74abeba8467b38c92cbd1f33e75f504d96655		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E2 10348 bytes
font_02_sfnt_off0001093d.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1093D 4324 bytes

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