Malicious PDF — malware analysis report

Static analysis result for SHA-256 062e02103a63b584…

MALICIOUS

PDF

91.7 KB Created: 2021-03-28 10:37:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 8ddb85b982852deb81705a19621bcd6a SHA-1: c4a0308f2701d0c4cc9765839d1eceb3206c53f4 SHA-256: 062e02103a63b584efa3a863135784793870d3bd376c8e0573ae34e17036d62e
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, indicating a link farm designed to obscure malicious destinations. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://xezojetit.ru/award?keyword=picture+dictionary+oxford+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481157/normal_601db469c1bcb.pdfIn PDF document text
    • https://sawuwirepugasup.weebly.com/uploads/1/3/0/9/130969548/favemujaveji.pdfIn PDF document text
    • https://medadafamu.weebly.com/uploads/1/3/0/7/130775854/gapemuju.pdfIn PDF document text
    • http://on-arenas.com/psychology_in_your_life_2nd_edition_citation6aw7a.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://stav-games.ru/the_essential_life_book_australianeulz.pdfIn PDF document text
    • https://sadozilodefizon.weebly.com/uploads/1/3/4/6/134659806/2159108.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471509/normal_5fe7863dd0f57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447258/normal_60160896d0da6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448535/normal_6002038305ae5.pdfIn PDF document text
    • http://marketitaly.info/hopdoddy_menu_el_segundo0stk7.pdfIn PDF document text
    • https://warevinigipa.weebly.com/uploads/1/3/4/8/134898994/ladete-levig-sutepujamo-kotid.pdfIn PDF document text
    • https://kusafowagu.weebly.com/uploads/1/3/1/8/131871480/jovomut.pdfIn PDF document text
    • https://kemigaguni.weebly.com/uploads/1/3/1/0/131070112/wagisedonabupafim.pdfIn PDF document text
    • http://itsamorem.com/858854047584w1yt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426966/normal_5fdec5de6addd.pdfIn PDF document text
    • https://rexawalifutox.weebly.com/uploads/1/3/4/4/134458468/modevosidowijad.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://pewaxoxepizus.rf.gd/rpf_math_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03f5046f-463a-4e3f-ab27-ecfc55503d99/kukukobidudisufizudob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17e3413b-9a00-4bde-a6dc-ebccb4830b31/canon_mf4450_printer_driver_64_bit.pdfIn PDF document text
    • http://vonizevugopu.rf.gd/glands_of_the_endocrine_system_release_their_hormones_quizlet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e0b6cfc-20d2-4510-b817-cdd238640b66/17077359166.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/766f0cf1-3774-4761-a1ac-0573dc111fbc/mackie_808m_fr_series.pdfIn PDF document text
    • http://pasasowagore.rf.gd/ergogenic_aids_in_sports.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10267 5116 bytes
SHA-256: f642803154324f9521f4c41ada9d5b2cc8fd4bef83dd75d170ca574a84bb9eca
font_01_sfnt_off000113f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F2 11904 bytes
SHA-256: b1e58a60fda964ef91f995217340b95074e5aa4684ffe56ad6a36753fe24ccb7
font_02_sfnt_off00013c86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C86 16544 bytes
SHA-256: 4354bd37e85197a997b2f6c8c8698034d2711068b41d1b66819094364c364bcc
font_03_sfnt_off000152ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152CA 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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