Malicious PDF — malware analysis report

Static analysis result for SHA-256 abeb0264968252cc…

MALICIOUS

PDF

93.3 KB Created: 2021-03-29 00:59:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7c73167cd53e72b93ebe4a98887d173f SHA-1: b0d24ccf35eede8f61f1658670f9eb8f23f0825b SHA-256: abeb0264968252ccc77a1ca47b266139caf67623e3d3e23c8efca16590fefd43
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful sites. The primary URL observed is 'https://gimoguvi.ru/award?keyword=logitech+bluetooth+audio+adapter+manual+pdf'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/award?keyword=logitech+bluetooth+audio+adapter+manual+pdf PDF link annotation
    • http://jozipuvuwuzaj.mywebcommunity.org/causative_have_something_done.pdfIn PDF document text
    • http://tejovotemikodes.getenjoyment.net/taipei_metro_map_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379841/normal_5ff9fba49b930.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418777/normal_6019487696ddf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369657/normal_602d7633c1efd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481170/normal_5ff71a4c30a45.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6acbaf94-bc62-4fdb-9a00-914544f0b606.filesusr.com/ugd/3ee118_555cade0e2b347ffbfc1ee2b7b2bb6d6.pdf?index=trueIn PDF document text
    • https://fac7854b-22c3-40b9-bef9-ee94a55a010d.filesusr.com/ugd/fba82c_9c796c2095dd48db9bcf3ee22c8f21c3.pdf?index=trueIn PDF document text
    • http://bixevefosado.epizy.com/att_uverse_packages.pdfIn PDF document text
    • https://e222b685-7c7f-4cee-b050-218328c89257.filesusr.com/ugd/c0232f_1d8a1f44203543ad9dc834f9b59295f1.pdf?index=trueIn PDF document text
    • https://7fc1e5b2-1dd8-4457-9de2-3dea1ab9f589.filesusr.com/ugd/fedd61_cdb460c65da849f9a1b1fd51207eb31f.pdf?index=trueIn PDF document text
    • https://e49cd12a-7e53-4a25-9f98-ae37b5ff2e44.filesusr.com/ugd/35dc59_ea26a86331e84be6a1f17624b2b75f83.pdf?index=trueIn PDF document text
    • https://cff07a16-13b2-455b-8a78-148a75b158b4.filesusr.com/ugd/cda0c7_f5ffd6fddb584825a9eb5a6f37fe4349.pdf?index=trueIn PDF document text
    • https://b1706aec-e9b1-4c6c-9a93-f14ef4a1c402.filesusr.com/ugd/3b47cb_57f887c177c745b4ac4f4e49ea17d35c.pdf?index=trueIn PDF document text
    • http://filalawemutul.epizy.com/pdf_to_word_converter_editing_software.pdfIn PDF document text
    • http://sakedasapivo.epizy.com/sindrome_de_abstinencia_neonatal_tratamiento.pdfIn PDF document text
    • http://fuxalobel.rf.gd/steelhead_fishing_report_troy_oregon.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
stream_004_off00012b35.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12B35 19924 bytes
SHA-256: 8edc3fe1b49c5b462543e856543e27fafca8dc40f048c276e16ec1baaf9d1c0a
font_00_sfnt_off0000f7b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B6 5472 bytes
SHA-256: 229fa65031cbd84a882d89c229c3108c8d3dfe2692c35bc9ec0de099e24a5f24
font_01_sfnt_off00010a2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A2B 9616 bytes
SHA-256: 15dda93780a491a801d60931a0bad25bf179eb92aee6de98ba2240b743a7d41e