Malicious PDF — malware analysis report

Static analysis result for SHA-256 c89914926cd27711…

MALICIOUS

PDF

94.8 KB Created: 2021-03-16 19:57:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 3b26dfaf83f72437cb38731aae2cd1d8 SHA-1: d4eb0da976081c44cb41c309dae8a101fc97d9f7 SHA-256: c89914926cd2771181c5ff3989a085611c5ca183b933b53759d679ea059ba894
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://leonvi.ru/strik?utm_term=line+6+spider+iv+15+watt+price PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459625/normal_602c9e28c3f0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374366/normal_6035fef13709b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475999/normal_604ebb77738b1.pdfIn PDF document text
    • http://my-favshoph.online/zokefunomabafewoe4b7l.pdfIn PDF document text
    • http://ejqy.com/wuzaritebevalonudfrgah.pdfIn PDF document text
    • https://cdn.sqhk.co/tudosiki/hajrv9u/40451481694.pdfIn PDF document text
    • http://rikaseligexodiz.22web.org/sounan_desu_ka_manga.pdfIn PDF document text
    • http://helpverifedbadges.com/download_baidu_browser9zb2g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366399/normal_6039533d96bf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411915/normal_6033f39b343b7.pdfIn PDF document text
    • http://sodaapp.pro/3d_games_for_android_2._2._2xcost.pdfIn PDF document text
    • https://cdn.sqhk.co/sojowidaz/dhbifhb/galaxy_full_hd_live_wallpapers.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
    • http://wemubivoparuf.epizy.com/38780350457.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aa1388a-e45b-4c06-b148-ca673df2efbe/37870518107.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85cd06a9-b220-4abc-b5d5-af717dfaa044/university_of_edinburgh_os_maps.pdfIn PDF document text
    • http://bajokekez.epizy.com/99344724049.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e4c1cee-76d2-4257-ab0a-7e3b4ffe51df/a_court_of_thorns_and_roses_character_quiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eba0b988-60d7-481c-9231-93225b3d7b67/directions_for_true_or_false_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c88134d2-a42e-4f12-8c79-5eaf7db20eef/craftsman_yt3000_drive_belt_part_number.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/yfn_lucci_hit_em_up.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/93646526414.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/verbos_en_ingls_conjugados_en_presente_pasado_y_futuro.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/ark_survival_evolved_taming_guide_xbox_one.pdfIn PDF document text
    • http://katutexe.epizy.com/jon_duckett_html_and_css_review.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000123c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C8 5136 bytes
SHA-256: 948e9ad8c367736d8fe6470e62a551d6d81a1d13b06014f026f6a89b6baab503
font_01_sfnt_off0001355c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1355C 11988 bytes
SHA-256: a0abf9abad1307c010d622a1c530cc8c313848afa14d482e2c412cd08416bc54
font_02_sfnt_off00015dda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DDA 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361