Malicious PDF — malware analysis report

Static analysis result for SHA-256 c928624c6e3df64e…

MALICIOUS

PDF

68.6 KB Created: 2020-12-26 21:33:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 68c5dd192a577980c7c0288b4b59d061 SHA-1: 9dbbc86903eb5a45ef27609b539ac68a69248ce6 SHA-256: c928624c6e3df64eeba31b3f6e347f30084a6ef8d40085be8722a4b463fec7aa
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. This suggests the document's primary purpose is to redirect users to a network of malicious or potentially malicious websites. The ClamAV detection and ML classifier further support its malicious nature, indicating it's likely a phishing or trojan distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffset.ru/123?utm_term=plural+of+chassis+uk PDF link annotation
    • https://cdn.sqhk.co/tiruxugajo/BvgSCid/blackmail_odia_movie_hd_video_song.pdfIn PDF document text
    • https://kojepogezoxuta.weebly.com/uploads/1/3/4/4/134487575/2d507b.pdfIn PDF document text
    • https://cdn.sqhk.co/rodoruwuwab/cjxZsja/truck_bumpers_at_iowa_80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387037/normal_5f8d0fea4b464.pdfIn PDF document text
    • https://turekapagatonug.weebly.com/uploads/1/3/4/3/134327337/9050079.pdfIn PDF document text
    • https://cdn.sqhk.co/kurinunuwor/9njicKy/rewapexewobuv.pdfIn PDF document text
    • https://zalopajozi.weebly.com/uploads/1/3/1/4/131453352/giwozu_burepumemedava_xujugisepuret.pdfIn PDF document text
    • https://cdn.sqhk.co/fumazuri/fRPji5V/78662457027.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/tiladejonu.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/tomaxade/picture_description_worksheets_for_grade_4.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/obusforme_300_massage_chair.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/swing_noun_form.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_off0000ca57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA57 5036 bytes
SHA-256: 7d8ba77c66072fa16311186db8cacf2d27e19e441f87eb7ecd7a70d96ad80e5e
font_01_sfnt_off0000db72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB72 12752 bytes
SHA-256: 4ddf055dd9f285e1164d7edc21160411970974736f71f61744a41caaa9d5b27e

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