Malicious PDF — malware analysis report

Static analysis result for SHA-256 56fab328c783c618…

MALICIOUS

PDF

94.0 KB Created: 2021-04-21 08:08:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5ceba93e2418e0a3b50b5db6d0aff687 SHA-1: 242e8489ea672781759549d9876eb2aa92b8fec3 SHA-256: 56fab328c783c61819cccdc2f76b0abb4db4ef359eb5ab2b6c0e8a9647268175
186 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest an attempt to lure victims to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=daily+life+of+ancient+egyptian+peasants PDF link annotation
    • http://lixixivukagoda.66ghz.com/game_booster_app.pdfIn PDF document text
    • https://jizetexosobuwek.weebly.com/uploads/1/3/0/7/130740437/3005109.pdfIn PDF document text
    • https://zuxijonimobazi.weebly.com/uploads/1/3/5/3/135351106/b12091760.pdfIn PDF document text
    • http://vesimawamom.66ghz.com/lewanewesaxazi.pdfIn PDF document text
    • https://guvoladedesu.weebly.com/uploads/1/3/1/4/131453897/7319aa883c56b4e.pdfIn PDF document text
    • https://dozexida.weebly.com/uploads/1/3/4/5/134590021/tenom.pdfIn PDF document text
    • https://pinagoremomaj.weebly.com/uploads/1/3/0/7/130738806/aa8cd97.pdfIn PDF document text
    • https://sazalilo.weebly.com/uploads/1/3/4/5/134592982/52d5933aa1.pdfIn PDF document text
    • https://cdn.sqhk.co/nugizape/jdC4igV/international_day_of_peace_facts.pdfIn PDF document text
    • http://sapuzex.22web.org/mice_of_men_characters.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonotiso/1jhfhcm/gif_live_wallpaper_iphone.pdfIn PDF document text
    • http://vixerixobo.22web.org/37649111847.pdfIn PDF document text
    • https://zoxamadafipezo.weebly.com/uploads/1/3/1/1/131164297/2292931.pdfIn PDF document text
    • https://difanewoxapazu.weebly.com/uploads/1/3/5/3/135321324/5b43bf47ab4c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c480cc3d-c044-45b7-a7fa-747782367dcd.filesusr.com/ugd/a26f59_0a9f01b534234d75a9ef3dd80829c47f.pdf?index=trueIn PDF document text
    • http://komivarutu.epizy.com/pureta.pdfIn PDF document text
    • https://6b21c484-99f8-4e97-b77a-b77c054bfe5d.filesusr.com/ugd/f139d4_6601edd5f4d34332a0c966208911e10d.pdf?index=trueIn PDF document text
    • https://238a82c5-85a8-4641-a991-2f0f5270ddc4.filesusr.com/ugd/63f22d_bde9e2237f65452a84916a8b3404c9dd.pdf?index=trueIn 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_off00013597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13597 5188 bytes
SHA-256: 58a84f62b8740c70266be02d129b4cde68aec6554ef7b6d9d4072e4aaa3e7fec
font_01_sfnt_off00014770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14770 10404 bytes
SHA-256: 393c90399d2f0e6f7f924f1c1d4ebdefb3c18d9732bbb24965a23d79a993ace7

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