Malicious PDF — malware analysis report

Static analysis result for SHA-256 b07af30f53e9b1f9…

MALICIOUS

PDF

79.8 KB Created: 2021-01-08 15:55:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 8d5a56d968c65c793903b0bfcd9bf73b SHA-1: de28ca0ba22d9eefda35ec7e6ca548b733fe6786 SHA-256: b07af30f53e9b1f9cd12c9137d54e9a415c97c70465c848f819889a7221f7e3e
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external PDF link farm, suggesting the document's primary purpose is to direct users to potentially harmful or spam-related websites. The ML classifier and ClamAV detection further support its malicious nature.

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
  • 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.
  • 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/123?utm_term=smoke+hollow+propane+smoker+replacement+parts In PDF document text
    • https://cdn.sqhk.co/kavejufa/ifibYHj/fomiledexemiranew.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/d9jd0hh/green_pumpkin_seeds_calories.pdfIn PDF document text
    • https://zijananuwale.weebly.com/uploads/1/3/4/4/134438714/napag-kozubi.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/jagux/all_of_me_piano_partitura.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/18729368079.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/broughal_middle_school_staff.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/sunday_school_coloring_sheets_on_love.pdfIn PDF document text
    • https://s3.amazonaws.com/zokokamu/bepazawuvirejapekitesek.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/42680919112.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/41794913254.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/comment_fusionner_des_en_ligne.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/604abdab-e834-4062-997a-fd4f311d7efc/siren_head_horror_escape_hell.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/bole_chudiyan_song_dance_performance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80cf3c96-e9d3-460b-b72e-994baae0a43b/pokisun.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_off0000f96b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96B 5432 bytes
SHA-256: 17c499157589c9f0d0a622bc652a2c32ae3a17b7f807db2f1ca8c087a470e7ec
font_01_sfnt_off00010bcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BCC 11180 bytes
SHA-256: d9e8c8e8f95435b9e5c8ceebf0ba7f22d7d0dae75e9ecfade0553d76596a5108

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