Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ac67688f2d57ba6…

MALICIOUS

PDF

77.5 KB Created: 2020-12-25 02:05:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a26861b4e43b08111f910337af987eab SHA-1: 14fdd8b6569c425f309032a2be0d1c177b9035a9 SHA-256: 9ac67688f2d57ba67b46e443b4128c607f1dd7256d2140223c6e3ee9eb45afe3
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to disposable hosting services and redirector infrastructure. The primary link, disguised as a game download, leads to a known malicious redirector. This indicates a phishing or scam attempt designed to lead the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • 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/strik?utm_term=descargar+pes+club+manager+para+pc
    • https://zukamukenipebo.weebly.com/uploads/1/3/1/3/131380388/voxapozizusi-masazop.pdf
    • https://nedotumawu.weebly.com/uploads/1/3/4/6/134626041/1021409.pdf
    • https://cdn-cms.f-static.net/uploads/4444371/normal_5fa6dcf089019.pdf
    • https://sinukofulav.weebly.com/uploads/1/3/4/6/134634738/fumukezezurel.pdf
    • https://gatepeduvemixif.weebly.com/uploads/1/3/4/6/134669895/8690316.pdf
    • https://dumisoxi.weebly.com/uploads/1/3/4/6/134625223/3efa09d3.pdf
    • https://boxemafal.weebly.com/uploads/1/3/3/9/133997404/4926443.pdf
    • https://vudivopaf.weebly.com/uploads/1/3/4/8/134876542/3664822.pdf
    • https://jokepalebaja.weebly.com/uploads/1/3/4/3/134360350/dunifesapatixi.pdf
    • https://zekasujiminog.weebly.com/uploads/1/3/4/3/134366003/585768.pdf
    • https://cdn-cms.f-static.net/uploads/4455380/normal_5fdc3d4bda003.pdf
    • https://rikurifijuse.weebly.com/uploads/1/3/4/6/134681474/kakegibefokow.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/beb157e5-6a24-4980-ac3c-2c7ea1f02efc/fafabivezorepesuzon.pdf
    • https://uploads.strikinglycdn.com/files/ddd36465-3323-4412-a56f-3b02d31cccc4/11860329464.pdf
    • https://uploads.strikinglycdn.com/files/e6d7b87b-ba5f-46e0-9d3b-ff47314e1c7b/56951341414.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_off0000e5f7.bin
9c84aca5171cf4522e1fd23f3e5391e17c8e645cdcb740b4c3036af6865bd014		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F7 2900 bytes
font_01_sfnt_off0000f03c.bin
b2ef16894d73089fc2ccdcf1a842d35553a3cbea6c4f55eca80f7340a736c6bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF03C 5392 bytes
font_02_sfnt_off00010287.bin
b42837fbe4e55309875a0069fa51c9588700c5ef73f55ca36942f9d1f47d6b42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10287 11492 bytes

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