Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f4ff0cc861e8d64…

MALICIOUS

PDF

82.6 KB Created: 2021-04-20 21:50:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 290377ec0f022181fa7d16628fe71665 SHA-1: 5619640b5d4c7ba3b897c8e6a6eb6ac0508f8f7a SHA-256: 2f4ff0cc861e8d648f3c39ce29052ee3d58bd0eb410b60a23a040a3090dc6c5f
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for a link farm containing 30 external links. The ML classifier also assigned a high probability of maliciousness. The document's purpose appears to be directing users to a variety of external URLs, some of which are hosted on disposable domains, suggesting a phishing or spam campaign. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jumiwimov.ru/strik?utm_term=can+acca+work+in+india PDF link annotation
    • https://cdn.sqhk.co/luzaxatelal/3jc6hft/cadillacs_and_dinosaurs_mustapha_game_free.pdfIn PDF document text
    • https://cdn.sqhk.co/sajixobuko/idcjbq3/wood_project_plan_maker.pdfIn PDF document text
    • https://cdn.sqhk.co/moxoxitij/hDCFRuZ/nrg_player_music_player_apk.pdfIn PDF document text
    • http://dogusiwimukames.iblogger.org/nigoravigusixenazipov.pdfIn PDF document text
    • https://cdn.sqhk.co/nijazulagoza/TBnJoEO/wexowan.pdfIn PDF document text
    • https://cdn.sqhk.co/sijaxovada/ydIiiie/carli_bybel_x_missguided_chainmail_top.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/ijkFngg/marxism_definition_literature.pdfIn PDF document text
    • https://cdn.sqhk.co/wuxaguzifep/hiZAGRQ/shooter_jennings_singing_waylon_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/nodujugebi/zOhgJ6h/evaporation_and_condensation_worksheet_grade_3.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://bupebubu.epizy.com/applied_ballistics_bryan_litz.pdfIn PDF document text
    • https://9afb1793-bc57-4514-bb46-74e980466609.filesusr.com/ugd/11f207_fb401d5aa6744eb78d189aa809905f0b.pdf?index=trueIn PDF document text
    • https://e31b828f-dd5d-4b35-abba-5777d5fc2ed6.filesusr.com/ugd/56a8cc_fe6fe4b6d17a4ac581d4e4e014370970.pdf?index=trueIn PDF document text
    • http://pisatetakedabak.epizy.com/adverbs_exercises_with_answers.pdfIn PDF document text
    • https://8a833fea-7c9a-4d2e-a5a7-d3590f42a3e5.filesusr.com/ugd/9aab09_de5a4fc2e40742efb2767226396d9fdd.pdf?index=trueIn PDF document text
    • https://f7927488-8152-43cb-a667-e231f58cc5c5.filesusr.com/ugd/950cc9_cb766c613e0c42a692606edae831a046.pdf?index=trueIn PDF document text
    • https://da5bec28-7969-4117-8ffb-5069fce5e80c.filesusr.com/ugd/31593d_f874ded6da3b4c14a56b7f5285fc7a9c.pdf?index=trueIn PDF document text
    • http://xeletimozod.rf.gd/blue_bells_of_scotland_trumpet.pdfIn PDF document text
    • http://vomalowo.epizy.com/28876243681.pdfIn PDF document text
    • https://44dd6259-7513-41c7-b2f1-b2b1fc385d2e.filesusr.com/ugd/63022f_f862e83ea66945b89d8ca41a50e0a9d4.pdf?index=trueIn PDF document text
    • https://67bb8873-ca08-4da4-87c0-60a8072ebff6.filesusr.com/ugd/a838c0_abaceeed4bb04501a352c6ef70fb1bbd.pdf?index=trueIn PDF document text
    • https://711a90e7-97f2-4eab-8690-3003ec1e9b64.filesusr.com/ugd/a0905b_3302a39f773a4125884552b81c6d3f20.pdf?index=trueIn PDF document text
    • https://748e6e98-33e2-4bd1-95aa-01ea3505a154.filesusr.com/ugd/704f6c_9f162efe2e9e4e5587e6793832710663.pdf?index=trueIn PDF document text
    • http://borogibapomad.epizy.com/wekagodivukijojexeg.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
font_00_sfnt_off0000fa39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA39 4492 bytes
SHA-256: f013a4d028ea5a1357e12f4f3ea2dcccd89383f1d6fdaaee1a54268548eaec43
font_01_sfnt_off0001098a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1098A 11040 bytes
SHA-256: cbb1cec32bb4efbbc75ff631087617e2ff44b68436e9c3f7e5c084637626ffb7
font_02_sfnt_off00012f09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F09 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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