Malicious PDF — malware analysis report

Static analysis result for SHA-256 2909472b96cad03c…

MALICIOUS

PDF

70.2 KB Created: 2021-03-05 17:31:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 03cfe7370dc9fc9ca098a689a43ef356 SHA-1: 05ca788c728b0b465ec24b1d3ea1cd8c38f43ba5 SHA-256: 2909472b96cad03ca8d7d13844308ecb482307da7c793c51e37a2c8193983fe4
134 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it contains external URIs and is part of a link farm. The document body, though heavily obfuscated, suggests a lure related to a 'Gopro hero 7 black manual update'. The presence of external URLs, particularly the one pointing to zajinet.ru, indicates a likely attempt to redirect the user to a malicious site for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://zajinet.ru/wix?keyword=gopro+hero+7+black+manual+update PDF link annotation
    • https://cdn.sqhk.co/lokuwanij/fhgwTia/zudemitawutuzodakeluluko.pdfIn PDF document text
    • https://cdn.sqhk.co/baxemazisod/gfWaYPf/gotuloronozegezokagug.pdfIn PDF document text
    • http://jopagozopive.medianewsonline.com/burger_king_impossible_whopper_review.pdfIn PDF document text
    • https://cdn.sqhk.co/kumotuxijufu/b8oibG9/sonic_boom_2020_janesville.pdfIn PDF document text
    • https://cdn.sqhk.co/pavuraxutem/jhbiewb/steel_weight_calculator_excel_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/bitowiso/hjigijp/teaching_strategies_gold_objectives_24-_36.pdfIn PDF document text
    • http://robugipunebib.mygamesonline.org/patab.pdfIn PDF document text
    • https://cdn.sqhk.co/mojubemuwek/R7cCIij/vijirajixinejawugasupegog.pdfIn PDF document text
    • https://cdn.sqhk.co/jezaziritav/iMidDih/66890085699.pdfIn PDF document text
    • http://fefujikaviw.22web.org/hiatal_hernia_patient_information.pdfIn PDF document text
    • http://dotixomovi.sportsontheweb.net/the_redemption_project.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/89fae4be-cc6e-474e-8144-aa5e27b08638/matrixyl_3000_serum_side_effects.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/kunalevuluxemivatuxo.pdfIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/python_for_data_science_cheat_sheet_numpy_basics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ac38e94-8098-4cb3-ace6-fc8f4cf936f6/naziru.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/extreme_call_blocker_pro_apk.pdfIn PDF document text
    • http://tokiziguvavu.rf.gd/hell_let_loose_artillery_guide.pdfIn PDF document text
    • http://wotidupodugi.myartsonline.com/figetuge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dded8df-695a-4c81-a599-1cb797113bed/fujiniperisijejilari.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/22817892930.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/8876464204.pdfIn PDF document text
    • http://ledudixip.epizy.com/10892569694.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_off0000d71b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD71B 5448 bytes
SHA-256: f7af4e8d019a47fd3c93162c1a5a8fa5d899eb6d520b59ee74746a54c08e6285
font_01_sfnt_off0000e97a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97A 10028 bytes
SHA-256: e8dd74e27d460ad86937c4393615c9499d22cdc174b41e71f32bc21158ea8153

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