Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddb25e6338605196…

MALICIOUS

PDF

78.5 KB Created: 2021-03-17 07:49:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 838b2c76cb6df8166233db2d0d546609 SHA-1: b19e311c62c010bbf9b49b08388ed20e440530af SHA-256: ddb25e633860519696df0861c98cd6fbaa5c43ddb983e175e8f67662839bb183
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least two pointing to potentially malicious domains ('seumenha.ru' and 'mamontov-net.cc'), suggesting a phishing or malware distribution scheme. The PDF structure and embedded content, though heavily obfuscated, are consistent with attempts to redirect users to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/award?keyword=carcinoma+cervical+in+situ+pdf PDF link annotation
    • http://mamontov-net.cc/how_to_apply_iron_on_vinyl_to_a_tumbler50uub.pdfIn PDF document text
    • http://narelavupes.22web.org/reloading_press_kits_amazon.pdfIn PDF document text
    • http://jamisixed.22web.org/86426794783.pdfIn PDF document text
    • http://cmb-accueil.com/tutitiloveritekukurpjivt.pdfIn PDF document text
    • http://xubajaw.iblogger.org/gym_membership_cancellation_form_template.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zepalosolup.epizy.com/34752346135.pdfIn PDF document text
    • http://ziboporo.epizy.com/how_to_pair_jlab_jbuds_air_sport.pdfIn PDF document text
    • http://vojulemopo.epizy.com/apollo_animal_crossing_pocket_camp_gift_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/xaligesitajogoperemo.pdfIn PDF document text
    • https://76df98a8-3e94-4eee-a6f5-23e1de06049b.filesusr.com/ugd/54c74c_165616f4d7204961a4db163bc8b6868e.pdf?index=trueIn PDF document text
    • https://bc732cde-fb09-4fee-8ab5-c82a45a1131b.filesusr.com/ugd/2ac701_89c55bec6cdc4185b4cbab9a7bfe192c.pdf?index=trueIn PDF document text
    • http://wokebusaxefani.epizy.com/37393954360.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e723ef9-190d-4610-9dbc-692b1a03f657/zixumuxudez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3d2f6b1-e914-4b37-a07f-fdb1a32a6838/odd_thomas_movie_netflix.pdfIn PDF document text
    • http://xojazexodiwosi.epizy.com/salesman_cv.pdfIn PDF document text
    • https://4be8a7ba-6c9a-47a4-99fc-a5961b41a404.filesusr.com/ugd/132250_0003558af1454e2bb997281207dc58c6.pdf?index=trueIn PDF document text
    • https://d8acad56-eb9a-42d1-a06c-a695c5b02328.filesusr.com/ugd/0ad6c7_532b2eacf1a746ac8d7480b380b2252e.pdf?index=trueIn PDF document text
    • https://1c8fadd7-09eb-4d2b-9d42-8e747ba5ce52.filesusr.com/ugd/60625b_548e1374594141ae94b02574954c0cc1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cdff36d-9751-45f2-bacf-0f3ba243e0fd/duvibaku.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/blender_tutorial_for_free.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF137 5264 bytes
SHA-256: fb633446d9510ef4ab12006b20a67fb97622c50b4ceda261f15b5337689a53a8
font_01_sfnt_off0001030b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1030B 12672 bytes
SHA-256: e763f9904dcebde5527004d232620b3f6a9f3faa532abb8c9d3fe0249d466a24

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