Malicious PDF — malware analysis report

Static analysis result for SHA-256 e704c2c514cae437…

MALICIOUS

PDF

85.5 KB Created: 2021-03-04 02:02:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 1262f1d842839c29be0a6e7741a7bc62 SHA-1: 4606ed288d4b1ee7079166c1cdfebfe771355080 SHA-256: e704c2c514cae437177ad3861a95c9cdb358bf9548f8eea0b25a24ad809421af
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, with the primary URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xajibur.ru/strik?utm_term=manual+del+usuario+gps+garmin+etrex+venture+hc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4477655/normal_602107c3ac52f.pdfIn PDF document text
    • https://cdn.sqhk.co/mazoviwovusi/fjhKjeo/kiwubobupe.pdfIn PDF document text
    • http://zeboxagekej.sportsontheweb.net/betazojalodogilofud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446915/normal_60400bbe8493f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459483/normal_5fec59b9da520.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369141/normal_602309acd5327.pdfIn PDF document text
    • https://cdn.sqhk.co/poxudanefisi/ehbhaCY/26951108263.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403684/normal_600602760be55.pdfIn PDF document text
    • https://muxapikaw.weebly.com/uploads/1/3/5/3/135346573/kimotinalowe.pdfIn PDF document text
    • http://roselosudeve.sportsontheweb.net/vedodaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jemazejodep/a_level_physics_data_sheet_wjec.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/autocad_2016_filehippo.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/casper_linen_sheets_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/maze_runner_full_movie_netflix.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF919 5500 bytes
SHA-256: 0dd5e7de7f23bf2568775cbe351b11175b99bd456e6d7fcac25ceafdd34aca22
font_01_sfnt_off00010bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAC 15432 bytes
SHA-256: 2ac6e7492c046dee6358012786d5624a5acf03d3342b5f07d9426d50c39a949a
font_02_sfnt_off00013a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A30 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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