Malicious PDF — malware analysis report

Static analysis result for SHA-256 944beb8ef6848df0…

MALICIOUS

PDF

70.1 KB Created: 2020-11-24 21:57:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25795a4da206faafdc541b60f996362e SHA-1: 5d347acc1f1e985ebd75c940a7a72c7d627d5a38 SHA-256: 944beb8ef6848df005cee683e1e478782d0b874be527f5486a3eab4b5e6c87aa
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous external PDF links suggests a link farm used to obscure the ultimate destination or to distribute further malicious content.

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/strik?utm_term=bubur+cha+cha+simple
    • https://cdn-cms.f-static.net/uploads/4453901/normal_5fa0df297ddb4.pdf
    • https://cdn-cms.f-static.net/uploads/4371787/normal_5f9ddc42ec6b6.pdf
    • https://cdn-cms.f-static.net/uploads/4410722/normal_5fa590c8d3a5e.pdf
    • https://cdn-cms.f-static.net/uploads/4416665/normal_5fb293f16034c.pdf
    • https://cdn-cms.f-static.net/uploads/4379849/normal_5fa05fb843d5b.pdf
    • https://cdn-cms.f-static.net/uploads/4419191/normal_5fabd46a66776.pdf
    • https://nupejaxisolerez.weebly.com/uploads/1/3/4/3/134348845/budasolatipone.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/12234d65-7af8-44f1-b839-d27a27845447/bebobepugatadon.pdf
    • https://uploads.strikinglycdn.com/files/31aee26d-e149-4eb4-8e01-688c3d99e629/23569148296.pdf
    • https://uploads.strikinglycdn.com/files/d9a099d6-7a18-4d55-bef1-668f10843f20/wisafurijume.pdf
    • https://s3.amazonaws.com/dedinavesute/79436132176.pdf
    • https://uploads.strikinglycdn.com/files/636ab182-18e3-4870-9a04-0667cb2890a2/cinema_movie_apk_download.pdf
    • https://uploads.strikinglycdn.com/files/307de65a-057d-4e3a-bf35-c649ee5f963c/brazos_county_warrants.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_off0000cae2.bin
57b78f37a7dcfb856ee06007c3b64f4c261ee0181e548244adc043fa1531a625		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE2 3336 bytes
font_01_sfnt_off0000d6c5.bin
4b6642e429bbcee0331c4f89a74fec1b6d1aa5fcd9a5881083081244d3688f9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C5 5360 bytes
font_02_sfnt_off0000e8d0.bin
828d810c82cdfb6e812d7f1d8c40d46ee373ac998c0c155e5d2a248498737111		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D0 10032 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.