Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9c78fab26d1626b…

MALICIOUS

PDF

75.1 KB Created: 2021-05-02 03:48:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a8acdfef45874f10ce60dcd7908720ba SHA-1: 6167f9683080fb6f7b04b08b0547f96595053f92 SHA-256: e9c78fab26d1626b4f6b03f57abd7328b187d2923c5b9b3ee27626ed9a5e2ae4
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. The primary URL identified is https://nipisod.ru/strik?utm_term=what+do+enochian+mean, which likely serves as a lure or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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.
  • 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=what+do+enochian+mean PDF link annotation
    • https://kuxijixa.weebly.com/uploads/1/3/4/8/134856984/banabirof-sanigigowezug-zovadakawa.pdfIn PDF document text
    • https://tijagure.weebly.com/uploads/1/3/1/3/131398232/dovesaxux.pdfIn PDF document text
    • https://fokutape.weebly.com/uploads/1/3/2/8/132814024/e8ecb023e.pdfIn PDF document text
    • https://nupanirosum.weebly.com/uploads/1/3/4/8/134858368/wezuvuwomolakiv_derakopitam.pdfIn PDF document text
    • https://wizugelavuri.weebly.com/uploads/1/3/5/3/135325487/7949302.pdfIn PDF document text
    • http://japebevavagufip.22web.org/difuzuberigitudulixoval.pdfIn PDF document text
    • https://bazafegaxu.weebly.com/uploads/1/3/1/3/131383427/7548745.pdfIn PDF document text
    • https://rajizoru.weebly.com/uploads/1/3/1/8/131856770/muvafube_wevasadunos_wurisegibes.pdfIn PDF document text
    • https://radogatibemif.weebly.com/uploads/1/3/2/8/132815767/5073816.pdfIn PDF document text
    • https://gepinizidewepi.weebly.com/uploads/1/3/4/3/134305752/sazil.pdfIn PDF document text
    • https://zowotojezef.weebly.com/uploads/1/3/4/3/134330732/20fd193fab4.pdfIn PDF document text
    • https://tiwokixaxuvap.weebly.com/uploads/1/3/4/2/134235176/fatezokowifopuz.pdfIn PDF document text
    • https://vizepojazitebag.weebly.com/uploads/1/3/4/1/134108988/d88ad9e39d.pdfIn PDF document text
    • https://salobomuxalevi.weebly.com/uploads/1/3/1/0/131070078/1125573.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e15e25cd-407e-4596-9d93-3c525a1f6ab7/85627525763.pdfIn PDF document text
    • http://doketam.rf.gd/artificial_intelligence_book_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43634444-14d3-4c0a-aab3-16e151dba93d/the_crown_season_5_cast_prince_charles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/203f0227-13ce-4c92-9da1-5d9393b3f2e2/favuratagu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b058a7cc-21c1-4f68-8d2c-4b19cf2917a8/traktor_kontrol_s2_mk2_dimensions.pdfIn PDF document text
    • http://dujizadixupodur.epizy.com/ferrari_for_sale_under_100k.pdfIn PDF document text
    • http://doruxexim.epizy.com/11217200942.pdfIn PDF document text
    • http://votitagupen.epizy.com/tivezopezizonaxemem.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_off0000ebad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAD 4884 bytes
SHA-256: 1a51abcfe7d7fe3bc99aa81a5a6db0f0c58d2cd761b4103d75bf320758873fc5
font_01_sfnt_off0000fc36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC36 10316 bytes
SHA-256: 138ddd32b0b6cb8a0b401e4636efd536027ddf8eff48e55846f808405bd17cb3