Malicious PDF — malware analysis report

Static analysis result for SHA-256 2991ab3283dba38e…

MALICIOUS

PDF

72.0 KB Created: 2021-02-21 06:13:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 39ebb9bb6004f66f18970724baf4eaac SHA-1: ffc43e984ddf9e0acdc7a95047f962e9ea2143cd SHA-256: 2991ab3283dba38e6e19f56f4a34274ff33c201f0c2ff1fd1890c8a8c4cf15b5
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://seumenha.ru/wix?keyword=psiphon+pro+lite+handler+apk+mirror PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4402032/normal_5ff0b4b1ba100.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418391/normal_6011ecf692fd0.pdfIn PDF document text
    • http://exampl1214.com/691103808936y86t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376870/normal_6021c7e266186.pdfIn PDF document text
    • http://design-kvartira.info/mid_latitude_cyclone_grade_12lb2ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481993/normal_601c9b05a5c1b.pdfIn PDF document text
    • https://doritader.weebly.com/uploads/1/3/4/8/134885844/jinoruzukasavabeto.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393779/normal_5fee81051834c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488837/normal_5fee3584e642f.pdfIn PDF document text
    • http://flymoney.net/vezafavoxuvakebosa1b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476946/normal_601c62feb8334.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412382/normal_60318a9dbba1f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473618/normal_5feb71e5b1f5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369901/normal_5fd80ce266934.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402960/normal_5ffb6eb0798e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452862/normal_5ff14a91de8b7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/92413111514.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/bodexubogu.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/alarm_clock_sound_effect.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/goxixonajapegaxonowogojak.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD88 5264 bytes
SHA-256: d7a891e6f50e9511e84034cb0c45ed176abec2801f2592ae572283d2fd696774
font_01_sfnt_off0000ef3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3C 10336 bytes
SHA-256: 95d4efa2d5f60cb65f5e73d546fa48542bc547bb7feca07f4fe4a8a2eba31760