Malicious PDF — malware analysis report

Static analysis result for SHA-256 33be3dad7fc69007…

MALICIOUS

PDF

91.9 KB Created: 2021-05-19 06:35:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: befba01649f1d98b2c00a625bb82720f SHA-1: 5559dbf64a53f21c2e3d5da603dcda79f133790a SHA-256: 33be3dad7fc690070d81b1dc4b835db51733f2c360292e8dc8b978ed51d4777b
126 Risk Score

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 0.9994

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://nipisod.ru/strik?utm_term=teenage+mutant+ninja+turtles+nickelodeon+season+1+episode+1 PDF link annotation
    • http://fetiweresanamud.iblogger.org/digitech_rp500_manual.pdfIn PDF document text
    • https://vegebawijinewer.weebly.com/uploads/1/3/2/7/132740558/1943051.pdfIn PDF document text
    • https://rixuxakixolewe.weebly.com/uploads/1/3/1/3/131380342/nuvozabobof-paxufisu-valopiw-rorivuwaviki.pdfIn PDF document text
    • https://mixutuxo.weebly.com/uploads/1/3/4/6/134692071/melowideruzukazu.pdfIn PDF document text
    • https://wikefazopikevi.weebly.com/uploads/1/3/4/7/134715570/74359.pdfIn PDF document text
    • https://jobalexaxikut.weebly.com/uploads/1/3/4/8/134892204/0cbe1.pdfIn PDF document text
    • https://lafasajuju.weebly.com/uploads/1/3/4/0/134017903/wowigelakosokoj.pdfIn PDF document text
    • https://vebudizegegogog.weebly.com/uploads/1/3/1/3/131398423/rirew-figaloraxugoxo.pdfIn PDF document text
    • https://rawavofim.weebly.com/uploads/1/3/1/4/131452817/2054b6a365ecc10.pdfIn PDF document text
    • https://buzufurabobozu.weebly.com/uploads/1/3/5/3/135304208/peluzerupo.pdfIn PDF document text
    • http://tifetatujuvib.22web.org/rampton_cqc_report_2019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bojilukirifep.rf.gd/how_do_i_find_network_security_key_on_my_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57037d05-fed7-4922-9cb7-c2341597ca69/mine_1_btc_a_month.pdfIn PDF document text
    • http://soxenaroguz.rf.gd/broadsheet_and_tabloid_newspaper_comparison.pdfIn PDF document text
    • http://xofiketur.rf.gd/lagu_avenged_sevenfold_afterlife_acoustic.pdfIn PDF document text
    • http://samowegepor.rf.gd/28862866179.pdfIn PDF document text
    • http://gebilame.epizy.com/punctuation_worksheets_grade_5.pdfIn PDF document text
    • http://gosonuvubunevo.epizy.com/22897234149.pdfIn PDF document text
    • http://dunixojojulif.epizy.com/pozoxareluguzib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/002d154e-02e8-446f-9fb8-8a0c0e155979/boss_lady_means.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e6e76b1-a1ab-4365-9125-e0379b649421/89708360807.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/092acae1-1343-41ce-a4e9-33864a186f8b/64551485006.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1718b43-9b79-4ea7-ae5d-8c082fd65264/military_athlete_ranger_school_prep.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_off00012490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12490 5536 bytes
SHA-256: ebee6db2ac1abfb572372957e78d3ab42919b3495996eaa0bccb95e445c2d319
font_01_sfnt_off0001375a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1375A 12688 bytes
SHA-256: 0c897082f04803b6afc8667f6502c3d9f3f7ad3fd561908f9c3969e781f5f28a