Malicious PDF — malware analysis report

Static analysis result for SHA-256 741f1ba332f57ed6…

MALICIOUS

PDF

79.1 KB Created: 2021-04-01 02:36:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f521abcba5c9838de35e616e606817d SHA-1: 1037af0b532c576dd1ea9ae862c046dbaad36353 SHA-256: 741f1ba332f57ed69c96d5f27caf97f7abbf660597e272e137a6b95e26809cbf
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO spam or phishing lures. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs users to decrypt a password-protected archive, a method often used to bypass security scanners. The presence of ClamAV detection and ML flagging further supports its malicious nature, suggesting it's a trojan designed for phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://ponafet.ru/123?utm_term=beelzebub+sub+indo+mp4
    • https://cdn-cms.f-static.net/uploads/4366647/normal_60297fc32b83b.pdf
    • https://cdn-cms.f-static.net/uploads/4443357/normal_602e65ccbbded.pdf
    • https://cdn-cms.f-static.net/uploads/4384150/normal_600a481674012.pdf
    • https://cdn-cms.f-static.net/uploads/4414172/normal_5fd8afa7017b0.pdf
    • https://geperibikabagop.weebly.com/uploads/1/3/1/4/131409385/38ad7d82.pdf
    • https://cdn-cms.f-static.net/uploads/4372982/normal_600b7aac0d383.pdf
    • https://cdn-cms.f-static.net/uploads/4385012/normal_605fb63789183.pdf
    • https://jakoxizejibak.weebly.com/uploads/1/3/4/3/134348863/300949d03.pdf
    • https://cdn.sqhk.co/gojinuma/cjdhjjf/wixopasimapedaboxiwugewag.pdf
    • https://static.s123-cdn-static.com/uploads/4377113/normal_5fc6dea9908d5.pdf
    • https://cdn-cms.f-static.net/uploads/4384299/normal_6060803ab897a.pdf
    • https://cdn.sqhk.co/taxodisilif/e8Fhghf/amazon_a-_z_guarantee_refund_claim.pdf
    • https://cdn.sqhk.co/wevafofed/I2gdihg/vawixexarekapakiku.pdf
    • https://cdn.sqhk.co/lakivasulis/ia6hfif/crime_angel_superhero_vegas_air_strike_hack_apk.pdf
    • https://cdn.sqhk.co/zuvomafoda/ihxhgha/68341806210.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dobesogum/17359899253.pdf
    • https://s3.amazonaws.com/siwixomudit/butternut_squash_lasagne_sheets_how_to_make.pdf
    • https://s3.amazonaws.com/fajeloninesitel/puvunida.pdf
    • https://s3.amazonaws.com/bakoloj/baveva.pdf
    • https://s3.amazonaws.com/vebogotexaf/elite_dangerous_horizons_combat_guide.pdf
    • https://s3.amazonaws.com/sinamozagemoger/33759215498.pdf
    • https://s3.amazonaws.com/tobaziw/47076001953.pdf
    • https://s3.amazonaws.com/zerepuzuze/kuwepakedev.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_off0000e829.bin
ff0db0d3390055945c835d159ab715cd56134c352c361c97efb65581a0dca7c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE829 4272 bytes
font_01_sfnt_off0000f70b.bin
ba95094fe1352c16c93ddef8f2edd0386816a183466ebcc76c85d2209236b255		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF70B 5128 bytes
font_02_sfnt_off00010871.bin
9476fb9cb6989c6142c8dd16d742c27554057e5647cd11e1440ce1980c9f79f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10871 11100 bytes

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