Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd87c31b7817388a…

MALICIOUS

PDF

68.9 KB Created: 2020-11-19 06:23:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8a23802ca64da4255a3b09225c9a2d48 SHA-1: def569367ddd8459f7682f80c8f2ca05a98d94be SHA-256: cd87c31b7817388a38e45d0c97e91044f0504d1771dae9d0ddc9289253646e4b
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 0.9997

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
  • 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://gettraff.ru/strik?utm_term=autocad+plant+3d+training+pdf In PDF document text
    • https://bafovulik.weebly.com/uploads/1/3/1/0/131070506/5094121.pdfIn PDF document text
    • https://xataramev.weebly.com/uploads/1/3/4/3/134320843/tapalisizemef.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/xedewofuretujo/ponuwesowogilumipuzoxe.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/mcydsnb_retail_card.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/wasokame.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/64639090770.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/62974683590.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/abnormalitas_telur.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/millard_south_basketball_schedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d48a6463-2632-4003-8a59-f786da5ba885/honda_civic_driver_side_mirror_repla.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/kunkka_ultimate_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10c0620a-7c56-436b-a6ac-2b36ffe07f41/prembhushan_ji_maharaj_bhajan_mp3_fr.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/41173254204.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a8bf434-99c1-48f8-9285-48f96671f996/vtech_manual_cs6829-2.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_off0000ceba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEBA 5296 bytes
SHA-256: f9de3ab5a496800b7975ff19f83371a4b19f13b325bd574a5f52025651d543f4
font_01_sfnt_off0000e0d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D8 11132 bytes
SHA-256: 34804b092894bc0815dc57ec7a5ba178a24fe323ffe392c688522b30fd5e46af

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