Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef38d10123c7e962…

MALICIOUS

PDF

85.6 KB Created: 2020-11-24 18:41:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba311daaea532c0f8ec324a31ed54ae3 SHA-1: d7105c023b2f25dc584d60047f4b36edfd48f67b SHA-256: ef38d10123c7e96243c449f2bb7c46e0a711b9279f27f1f6e44b2366b8bba975
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified by the 'PDF_SEO_LINK_FARM' heuristic, pointing to various domains. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically classified as 'Pdf.Phishing.Trojan'. The embedded URLs suggest a phishing or content-farming scheme, aiming to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffnew.ru/123?utm_term=pancha+tantra+bengali+pdf
    • https://cdn-cms.f-static.net/uploads/4413845/normal_5f9577ad33293.pdf
    • https://pudonaneguk.weebly.com/uploads/1/3/4/7/134767047/2196779.pdf
    • https://cdn-cms.f-static.net/uploads/4450731/normal_5fa6f1edda1ae.pdf
    • https://cdn-cms.f-static.net/uploads/4370268/normal_5f9dd819063e6.pdf
    • https://cdn-cms.f-static.net/uploads/4388062/normal_5fa3514d0d813.pdf
    • https://cdn-cms.f-static.net/uploads/4458856/normal_5fb837c148f7c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lunojol/1670345018.pdf
    • https://uploads.strikinglycdn.com/files/e98c7098-da59-4d28-969e-bd9785ecd0cf/sozifirisetekimexarogumax.pdf
    • https://uploads.strikinglycdn.com/files/f1e66360-41ee-40a2-bbb1-8a45dbf2a0e9/43210399811.pdf
    • https://s3.amazonaws.com/tibanepoxilibud/21021315011.pdf
    • https://s3.amazonaws.com/gosete/how_to_install_cinema_apk_on_firestick_4k.pdf
    • https://uploads.strikinglycdn.com/files/9e169178-72bc-4869-ba79-4867c4c6a7cf/tezowomoziwoninanevejipe.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df22.bin
4f86856632499582098fb07ca24aa95f21db993d816db29f865144385dd094fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF22 5380 bytes
font_01_sfnt_off0000f15f.bin
676559b847ac3463e45bfbc234e099fb0771ce1c1ef0650184fa434529673882		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF15F 4544 bytes
font_02_sfnt_off0001000a.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1000A 1800 bytes
font_03_sfnt_off00010898.bin
06f847079b43a999f843da85343f83996058cabae5e92a2b461c67159ff1f5f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10898 12692 bytes
font_04_sfnt_off00013216.bin
eb67323a3edc51f073cf7ae7c668a4400309481d93a41d1ca3bfc03d889966df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13216 16060 bytes

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