Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6cb6504dad1b0d7…

MALICIOUS

PDF

70.1 KB Created: 2020-11-26 18:35:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 80da28768942ca54c1b4f706890a36a0 SHA-1: 1a73e92e4bbbf3389163e92c7c83746b3dd90ec3 SHA-256: a6cb6504dad1b0d76ff67a30a747ba1a5bde0108a5b731be9e7bb0ca1615a1cc
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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=free+adult+sites In PDF document text
    • https://zusadadej.weebly.com/uploads/1/3/4/8/134856209/fuseragu-jazutosut-ladosepab.pdfIn PDF document text
    • https://vetaneje.weebly.com/uploads/1/3/4/7/134729364/nazewojumutid.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/rimepusox/13129521267.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae3dd3e2-9515-4909-a963-a4090bb3551b/cheap_thrills_mp3_download_320kbps.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/array_map_vs_foreach_performance_php.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/algebraic_expressions_grade_9.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/major_approaches_of_public_administration.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/remolatojewasutexubus.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/wevefalavavotaputuw.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/answer_for_have_you_been.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/38760963550.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/voronejija.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/towawilopefagerazozun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4069caac-f1a7-475e-bd96-1ff5112ea6d9/75800609788.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_off0000cab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB5 4440 bytes
SHA-256: a7a13dd0f04efca4a15937a48539a3711d01817858c6e0bce48bf2c640fc2e36
font_01_sfnt_off0000d9c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C7 10516 bytes
SHA-256: 69506376c76944d30e5a5fcb28fa65ebfb4937c7d6c8a05b996e501c30f21c70
font_02_sfnt_off0000fdcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCB 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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