Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8ac646ba67e1762…

MALICIOUS

PDF

82.2 KB Created: 2021-04-07 04:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9d0784561b59c0055199d3f0c54bc27c SHA-1: 1611677fc32485c8ba2d281f81f77f5e0111552d SHA-256: a8ac646ba67e176261f192376328b78f989a8a760e3031d6cc0872a85f6b3cbe
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 large number of external links, identified as a link farm, which is a common tactic for distributing malicious content or phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to potentially harmful sites.

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://fokemale.ru/strik?utm_term=cuisinart+coffee+maker+dcc-1200+replacement+parts PDF link annotation
    • https://namekabesomi.weebly.com/uploads/1/3/4/6/134668803/9d78b4.pdfIn PDF document text
    • https://cdn.sqhk.co/gadowikuxe/oTZVYO1/block_matrix.pdfIn PDF document text
    • https://cdn.sqhk.co/rijomawonuj/3jdecif/happy_planner_mood_tracker_stickers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382004/normal_602bace02af7e.pdfIn PDF document text
    • https://bigimenuxorotel.weebly.com/uploads/1/3/4/6/134655509/kamekuran_bijidagim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381302/normal_605d6e8b0bcfb.pdfIn PDF document text
    • https://cdn.sqhk.co/vagizabibo/c4Jghhc/run_run_rudolph_kelly_clarkson_live.pdfIn PDF document text
    • https://cdn.sqhk.co/litanamamusi/tieayhb/6965921452.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481272/normal_6013a3a227c41.pdfIn PDF document text
    • https://cdn.sqhk.co/jekunesoru/A5ibyRB/85027396069.pdfIn PDF document text
    • https://cdn.sqhk.co/nixafusoda/rPS2jbd/griseofulvin_interactions_with_aspirin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413361/normal_6011e4bf99ac8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c70d04c-b08a-428c-a879-e24846a39c44/a_dolls_house_by_henrik_ibsen_movie.pdfIn PDF document text
    • https://c0cead0d-5248-483d-940e-95cc3acd9bde.filesusr.com/ugd/20d83a_80c3b9946f4b47b1b2dfb0aef525b93c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ced3c92-843e-453c-932a-2048a44b2d37/english_grammar_book_class_7th_ncert.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28458aac-6e2e-4fb7-9afc-edd9cb80dc8a/73852086396.pdfIn PDF document text
    • https://af18ad75-7652-4b25-b9e0-8da5fded0af1.filesusr.com/ugd/529385_1aadfffe76c1452cad3af879086df409.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e45f6e37-89ba-43f5-b9a0-b8bec1a6a179/se_vuol_ballare_sheet_music.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_off00010223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10223 5628 bytes
SHA-256: 80877b1c8f2b69dd5ddb26c06efa2cb054076b541d92ef9e795e1dad446207dd
font_01_sfnt_off0001153a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1153A 11308 bytes
SHA-256: f2e2f5fb05b7a897705bbf68abc5952c5ccec2a2d4fb1c2f15565f6608957835

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