Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e7b2818412cc6aa…

MALICIOUS

PDF

77.5 KB Created: 2021-02-27 22:14:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c0fb7c8145e679b153e89192dec0d2f9 SHA-1: dd4abe86f168a722cf4e64f581f50f3c11e65960 SHA-256: 9e7b2818412cc6aa901948875eab354727076794b1669cb5ba68f5705f60861f
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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/strik?utm_term=used+dungeons+and+dragons+5th+edition+books PDF link annotation
    • http://big-ita.space/lanofesenusazizufic52rt.pdfIn PDF document text
    • https://cdn.sqhk.co/rogapakaler/Snwijjd/21316337883.pdfIn PDF document text
    • http://wemexuj.22web.org/callahan_state_park_map.pdfIn PDF document text
    • http://magabof.22web.org/25172914914.pdfIn PDF document text
    • https://cdn.sqhk.co/tifobebe/m3jcicU/ropasodupavajaxadimamoru.pdfIn PDF document text
    • http://eurostore.info/womabelaverel1nzcq.pdfIn PDF document text
    • http://noxesim.iblogger.org/jaybird_freedom_sprint_battery_replacement.pdfIn PDF document text
    • https://cdn.sqhk.co/xubuzivo/OIjjEBJ/pixel_art_book_happy_coloring_pages.pdfIn PDF document text
    • http://kofodotig.sportsontheweb.net/xufeva.pdfIn PDF document text
    • https://cdn.sqhk.co/tixukiko/hEieijG/fluke_805_vibration_meter_software.pdfIn PDF document text
    • http://serodot.iblogger.org/kuvusovefoj.pdfIn PDF document text
    • http://dhl-order.info/the_case_for_christianity_cs_lewis0t1fj.pdfIn PDF document text
    • https://cdn.sqhk.co/zinazejoras/VMigjeJ/48294394669.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/mipizaju/vogovulajazakeluva.pdfIn PDF document text
    • http://fipenalexaxa.epizy.com/the_art_of_the_comeback_quotes.pdfIn PDF document text
    • http://katetagozu.epizy.com/queen_platform_bed_woodworking_plans.pdfIn PDF document text
    • http://tejojode.rf.gd/n_m_letter_images_in_heart.pdfIn PDF document text
    • http://junenizexi.epizy.com/57827642387.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/free_spss_amos_full.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FD 5256 bytes
SHA-256: 58e299303b1fd3280b55fb3284ce6eb9266d3dc85a6553fe8cba5f09ee759275
font_01_sfnt_off0000f2cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CF 11620 bytes
SHA-256: 02fdc6ade081f9cd18422c433a7b5a30fd594c2ac226dcb70dd99b4d637ef391
font_02_sfnt_off00011a4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A4D 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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