Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e7f885b5f3221de…

MALICIOUS

PDF

90.8 KB Created: 2021-03-30 05:31:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9aac86f52e7a63eafeff87ab60993897 SHA-1: d61cbb3dd0c9589dc87c4ff3f8163fb3beb728e5 SHA-256: 3e7f885b5f3221de8634b454ee3561e0aa9328803c96e1279f61f9d47be4d9b4
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that appears to be part of a lure, referencing 'capresso grinder parts' in its query string. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest a phishing attempt designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://xezojetit.ru/wix?keyword=capresso+grinder+parts
    • http://erogan-columbia.site/33073485068bluh1.pdf
    • http://salizib.iblogger.org/coach_corey_wayne_book_amazon.pdf
    • https://lejonelawubuw.weebly.com/uploads/1/3/1/4/131453657/zugepoj_jiwapipivexux_jebawiva.pdf
    • https://pafajawu.weebly.com/uploads/1/3/2/6/132682051/7420158.pdf
    • http://fogogesedawe.iblogger.org/cambridge_grade_7_maths_past_papers.pdf
    • http://usersdeviceprotectionservice.site/gamimepotelltm2e.pdf
    • http://paxibokojusaduw.22web.org/benabook_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/poresi/84274288465.pdf
    • http://jowokepo.atwebpages.com/mazav.pdf
    • http://vujapoguxesak.myartsonline.com/first_90_days_app.pdf
    • https://s3.amazonaws.com/lorerexeg/how_to_turn_on_polaroid_sun_600.pdf
    • http://foduvikedumule.rf.gd/wugaveki.pdf
    • https://s3.amazonaws.com/zaxefemebidaz/6029517131.pdf
    • http://beparojolen.epizy.com/32169672173.pdf
    • http://xutunebel.epizy.com/fowokazaje.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012595.bin
80def811758257370e2da0b2b066d2a0f8fec686b71e76c5cef1d9b8bf5dd105		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12595 5000 bytes
font_01_sfnt_off0001369f.bin
42841f974ecfbed48da4e094c0a7fb69f5d7dffd4b6ce8f78c427c14bb1cf47e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1369F 11764 bytes

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