Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac553f47dfc8c384…

MALICIOUS

PDF

96.1 KB Created: 2021-02-16 03:40:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 059ecb881785339ec3ef9b8cd147f2a9 SHA-1: 992a5a8aebb6b801cad18a9f97ab0e27b7cebdb1 SHA-256: ac553f47dfc8c3842719b0b008878c1c29679eb16b4aef9a3440d8979c12c610
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jacksth.ru/wix?keyword=nespresso+delonghi+vertuoline+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446034/normal_602abb0c9b715.pdfIn PDF document text
    • http://rerubin.space/wowhead_demonology_warlock_guide2g2q2.pdfIn PDF document text
    • https://vudulami.weebly.com/uploads/1/3/5/9/135964857/2341442.pdfIn PDF document text
    • http://ozalupa.space/arduino_coding_manualfvm75.pdfIn PDF document text
    • https://fogasofimoxor.weebly.com/uploads/1/3/1/0/131071298/zubudazobas.pdfIn PDF document text
    • http://levipek.22web.org/bob_omb_battlefield_sheet_music_trombone.pdfIn PDF document text
    • https://kaxojolomo.weebly.com/uploads/1/3/4/8/134885197/vagajokal-pigepef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426810/normal_5fe24e481385b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450041/normal_5ff027cd74ac1.pdfIn PDF document text
    • https://xexidizufom.weebly.com/uploads/1/3/4/5/134508107/5345351.pdfIn PDF document text
    • http://bumaga.bz/siskin_dash_cam_hd_manualrwtbz.pdfIn PDF document text
    • http://reduslimer.website/99335280894cu2f2.pdfIn PDF document text
    • http://uscreditinquiry.info/core_data_sheet_translatefj3pv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://varoniwarovez.rf.gd/guided_reading_activity_13-_2_answers.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011d65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D65 5404 bytes
SHA-256: 57c77884c607bd0c93b4e5cf4e206fe3c1c529763520528e9e024d8bf71d9b8e
font_01_sfnt_off00012f99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F99 2804 bytes
SHA-256: 8a1d04baa380aa39c0ed36c8d17bf3c6cb22dab4e0d30435b401c893ff368ea5
font_02_sfnt_off00013b6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B6B 9980 bytes
SHA-256: 8f636d6274e55b0b477e29c981d2921d7772695542e0375244ccf5358d4bfa89
font_03_sfnt_off00015db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DB2 16084 bytes
SHA-256: a3b8ae6cb61a975f1aaa3bdf1d75290c2750726bc6c8d8b6ec62e4e9f5cc9978

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