Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d843393fa86ab7d…

MALICIOUS

PDF

84.8 KB Created: 2021-03-23 00:26:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f244bd46f189946295103e0fcbd11d3e SHA-1: 0cbe09a807c74982027bad882ded1479bffa2389 SHA-256: 8d843393fa86ab7d424e7776f2d57b7ac6d0e258d5e4a88d9a7831a339107c52
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with one pointing to 'xezojetit.ru', suggesting it's part of a phishing campaign. The document body, though heavily obfuscated, appears to be a lure related to a 'Craftsman leaf blower fuel line routing diagram'. No scripts were extracted, but the presence of external links and the malware detection strongly suggest a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xezojetit.ru/strik?utm_term=craftsman+leaf+blower+fuel+line+routing+diagram PDF link annotation
    • http://pubomoxagu.22web.org/zivirobasimolup.pdfIn PDF document text
    • https://cdn.sqhk.co/lotidonita/GStuiel/armaan_malik_new_song_2020_list.pdfIn PDF document text
    • http://b4shop.icu/canon_pixma_mx922_ink_cost6iyy7.pdfIn PDF document text
    • https://cdn.sqhk.co/dosijowikul/igEjiie/21100280482.pdfIn PDF document text
    • http://scotiaenlineape-personas.com/sodastream_one_touch_fizzi_whitefn3xm.pdfIn PDF document text
    • https://cdn.sqhk.co/kerikone/uIgdDja/pac_man_world_20th_anniversary_ps3.pdfIn PDF document text
    • http://erkutungotu.com/continuum_mechanics_free_downloadkqj14.pdfIn PDF document text
    • http://rumulive.iblogger.org/papidiberalisutone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406169/normal_5ff1ce1508b7c.pdfIn PDF document text
    • http://about-fb-support.com/a_first_course_in_database_systems_3rd_edition8gizv.pdfIn PDF document text
    • https://cdn.sqhk.co/pelopuxi/WlgggdR/kilaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_6009cba101b34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489411/normal_604b200cbead9.pdfIn PDF document text
    • http://malapiwo.66ghz.com/12936526452.pdfIn PDF document text
    • http://volazanuva.22web.org/el_saber_proscrito_alice_miller_gratis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vebujameja.rf.gd/tedibo.pdfIn PDF document text
    • http://pumukozozuzife.epizy.com/public_finance_and_taxation_exam.pdfIn PDF document text
    • http://pafemex.rf.gd/ganob.pdfIn PDF document text
    • http://genafivibin.rf.gd/sonoma_county_transit_bus_schedule.pdfIn PDF document text
    • http://dasopikabuma.rf.gd/allen_major_test_papers_download_2020_neet.pdfIn PDF document text
    • http://retinizani.epizy.com/bangladesh_map_hd.pdfIn PDF document text
    • http://zufagubiles.epizy.com/21915066502.pdfIn PDF document text
    • http://dikewovob.epizy.com/69994562332.pdfIn PDF document text
    • http://nerokigonone.rf.gd/brussels_sprouts_planting_guide.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_off00010da6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA6 5364 bytes
SHA-256: 4af2ba58c264094b1f47956b9c07ac83a0b131abd2f0161d71f19f71a9e74af4
font_01_sfnt_off00011fdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FDD 11100 bytes
SHA-256: 95d58685dbe5189b7664bd6f24b42cc5ccd7e2d9b47ac038376ecb98178468d5

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