Malicious PDF — malware analysis report

Static analysis result for SHA-256 f42f14c9ba9e35dc…

MALICIOUS

PDF

75.9 KB Created: 2021-03-31 22:45:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 025f14c1227b3101354eac463a0f8436 SHA-1: d901f10936f52e5ada73d8d7e33c12faf914a115 SHA-256: f42f14c9ba9e35dc55732811e14629567d62a0eb55c012924fb4d8fc40682c9a
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/award?keyword=statistical+reinforcement+learning+pdf'. ClamAV also detected the file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of a malicious URL within the document structure strongly suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/award?keyword=statistical+reinforcement+learning+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4479674/normal_60341428ddf4e.pdfIn PDF document text
    • http://organicnu.info/87802333367wx8yo.pdfIn PDF document text
    • http://italystore.pro/my_passport_ultra_vs_my_passportxufpl.pdfIn PDF document text
    • http://tuvosudokalidu.scienceontheweb.net/simplified_occupational_hygiene_risk_management_strategies.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425738/normal_5fcd3a4823b41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466154/normal_602da4da9254f.pdfIn PDF document text
    • http://helpcenter.business/11470357476dfrr2.pdfIn PDF document text
    • http://paxezot.getenjoyment.net/data_analysis_tutorial.pdfIn PDF document text
    • http://pogadai.xyz/real_book_6_edition_download4t0kj.pdfIn PDF document text
    • http://pihodze.com/how_to_graph_line_dataqhqq3.pdfIn PDF document text
    • http://gagivukamuw.getenjoyment.net/baxekeg.pdfIn PDF document text
    • https://neptune.aiIn��ReinforcementIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bejeseja/wegivuvogagilujarebul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a26cd48c-ac6d-4a3c-a1cb-a255b77638f2/vesododilekuw.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/xezefegelimexu.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/market_risk_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d04e8e30-cda0-4d26-9694-f2482d6feb15/24684788177.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/carousel_view_android_github.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/harmony_home_hub_review.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/xawepepikim.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/yakamaru_guide_rs3.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/certified_information_systems_auditor_cisa_training.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/rasedevima.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/dobelulapinijupuwidol.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_off0000e903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE903 5580 bytes
SHA-256: 204574875c709d91cc36b52fb371c2e5b713f2c506b1fb4cf8740abf18f5b4c4
font_01_sfnt_off0000fbe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE2 10704 bytes
SHA-256: 1dac27fce6ee15121ddd3c33a341bccbe83e09d53375721dc5723b38b30a9084

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