Malicious PDF — malware analysis report

Static analysis result for SHA-256 af4ce88ede849aef…

MALICIOUS

PDF

75.4 KB Created: 2021-03-07 22:38:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6f9753a0177aa0182a95cdc5aaa7f361 SHA-1: e8a8a98f229a76d7cce1e6c71e0532bb37f103a1 SHA-256: af4ce88ede849aefe1b07ee60f88ba2593d8db0de359d45dbd9172bae6a82ba2
126 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'jottigo.ru', which is flagged as a potential phishing or malware distribution lure. The PDF structure and embedded links suggest an attempt to redirect users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/wix?keyword=d%2526d+3.5+avariel PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4502188/normal_602ba8e05b653.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380084/normal_601425909de67.pdfIn PDF document text
    • https://lozofuxoxezutuw.weebly.com/uploads/1/3/5/3/135303337/gibanoxukeno.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490366/normal_6018a35253cef.pdfIn PDF document text
    • https://pupinalakarer.weebly.com/uploads/1/3/4/2/134234580/9719164.pdfIn PDF document text
    • https://vujezogovi.weebly.com/uploads/1/3/5/3/135348950/8104666.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460975/normal_604031e7021fe.pdfIn PDF document text
    • https://dituvilabo.weebly.com/uploads/1/3/4/8/134897320/d56fbc.pdfIn PDF document text
    • https://jabekidedur.weebly.com/uploads/1/3/1/6/131636775/235533.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/13865033831.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7e201bf-dbcd-4a47-b0a5-417c1b8dd514/arctic_king_portable_air_conditioner_10000_btu_reviews.pdfIn PDF document text
    • http://nusonakogip.epizy.com/delinquent_on_credit_report.pdfIn PDF document text
    • http://gavitum.rf.gd/somepibarelu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e95b73a-4c20-456f-a54a-c1f41341c097/garmin_etrex_30x_review_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/83649794666.pdfIn PDF document text
    • http://rutipozi.epizy.com/mahi_teri_chunar_dj_song.pdfIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/88459744425.pdfIn PDF document text
    • http://judewal.rf.gd/jokakegavasomuxugaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/078970ee-e3da-45b8-a0f0-1912ab66a9d0/which_dried_fruit_has_the_most_calories.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/bal_hanuman_2_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa8fcbbd-dfa4-479e-98ad-e6e419702cf8/marlin_60_scope_rail_size.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/how_many_types_of_psychological_disorders_are_there.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_off0000ebbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBF 4156 bytes
SHA-256: d46272a35c141788e45a942f60d3ac75eba256168db5716376ff56f0f84bb3df
font_01_sfnt_off0000f9ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9ED 12076 bytes
SHA-256: 8b7d73f33eb60d0b031f6ea120556aa2e8b58c42340831d8379f6b659995551b

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