Malicious PDF — malware analysis report

Static analysis result for SHA-256 42fd0f480e060e27…

MALICIOUS

PDF

99.6 KB Created: 2020-11-28 00:59:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f28f73374ad62fe6dfdd8b3c753b96d2 SHA-1: 5cce49d41d72a8ad0fcf8941007e940e6159e278 SHA-256: 42fd0f480e060e276fa1ef83ff8dc2ab74ef032f58f768befd4dc5f6279d4674
214 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 redirector infrastructure or are part of a link farm designed to drive traffic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs suggest an attempt to redirect the user to malicious sites.

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://ggtraff.ru/aws?utm_term=jordan+canonical+form+block+diagram
    • https://cdn-cms.f-static.net/uploads/4368735/normal_5fc180368b665.pdf
    • https://suxuwimuwudex.weebly.com/uploads/1/3/4/6/134641155/gotividanim-saxubezifowe-ronujimujezamo.pdf
    • https://jesufapupu.weebly.com/uploads/1/3/4/7/134764637/gukusu.pdf
    • https://toxavikosas.weebly.com/uploads/1/3/4/4/134437834/rotuwusebodibupize.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/875d5838-dc0f-4c67-b04c-8b137b641e5b/51733560619.pdf
    • https://uploads.strikinglycdn.com/files/8758a6cd-4d5a-438a-ae81-7eb5a594cd4f/magic_kingdom_parade_2019.pdf
    • https://s3.amazonaws.com/kujapomib/b_v_ramana_engineering_mathematics.pdf
    • https://s3.amazonaws.com/nezanurugega/gun_site_or_sight.pdf
    • https://uploads.strikinglycdn.com/files/edbc4858-84f4-487f-8b83-0b3cb1511f3b/pro_propane_clarion.pdf
    • https://s3.amazonaws.com/ditiruz/lujidud.pdf
    • https://s3.amazonaws.com/sewamos/33579006242.pdf
    • https://s3.amazonaws.com/xapijifas/blame_the_night_video_song.pdf
    • https://s3.amazonaws.com/fejenijovekozu/volkl_rtm_81_2018.pdf
    • https://s3.amazonaws.com/jolituzoji/gimawumasewomaxetakex.pdf
    • https://uploads.strikinglycdn.com/files/734abe8e-551f-44eb-813e-45390b341b79/jiwowakiki.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012806.bin
b5fd3cea5c263de933bbb740e62f2e42b5414939c8a6ea449f74e3d0de302e42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12806 5356 bytes
font_01_sfnt_off00013a2e.bin
0bc11fa0d051bd5b92ed78b4c1b1629f71d816a5edb62baa15ade72621182dbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A2E 14212 bytes
font_02_sfnt_off00016974.bin
f33d9c0b8693596b1f3cde3902227f607ace574056a0ce2d5e12392518546565		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16974 16808 bytes

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