Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a38fbacea57a9b3…

MALICIOUS

PDF

79.2 KB Created: 2021-03-08 20:08:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 8e5e68daa9831f490d890dc5af6c8b13 SHA-1: 861ab248a66a4c2075d054b19dd7b5e50d0c65ab SHA-256: 1a38fbacea57a9b3355f75beaa690314639da50c75aff84cb02ebe3b589a5655
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to 'jumiwimov.ru', which is likely part of a phishing lure. The document body, though heavily obfuscated, suggests a translation service pretext, aligning with common phishing tactics.

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://jumiwimov.ru/award?keyword=traducir+archivo+pdf+en+ingles+a+espa%25C3%25B1ol+gratis PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4467564/normal_5fca5f219958a.pdfIn PDF document text
    • https://valojeruxul.weebly.com/uploads/1/3/4/6/134681631/bokazida-semizulete-wesuvig-dafunokirugewi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486359/normal_60129cb67aaeb.pdfIn PDF document text
    • http://deliwubavamir.mypressonline.com/soned.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497110/normal_5fffcd4c78d0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494139/normal_5fe89d023854a.pdfIn PDF document text
    • http://posiximuteg.sportsontheweb.net/29216966174.pdfIn PDF document text
    • http://riniwodifole.medianewsonline.com/what_are_examples_of_universal_themes.pdfIn PDF document text
    • https://bibutijelogoper.weebly.com/uploads/1/3/2/7/132740620/nifewavani-zotok-zofowi-lexixuxorefo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486548/normal_5fdc4fd856178.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369509/normal_5feb7409a153e.pdfIn PDF document text
    • http://bitejes.iblogger.org/barcode_generator_program.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
    • https://s3.amazonaws.com/wofaxil/stop_auto_in_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/wujobuzudulapolazojapo.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/florida_driving_permit_study_guide.pdfIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/is_drinking_chai_tea_bad_for_you.pdfIn PDF document text
    • http://rulamiji.onlinewebshop.net/35903432757.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/93761650446.pdfIn PDF document text
    • http://jidibavozajo.epizy.com/redrix_broadsword_quest_guide.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_off0000e753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE753 5520 bytes
SHA-256: df7eb13748fd16a721ae805c3469f5df9b3eb2d695c9254944ac957b2e0e02cf
font_01_sfnt_off0000f9cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CF 11264 bytes
SHA-256: 57c619d12021b6cf74a51b1845b073b7a5cdcf56ceff071856f5da86eea26737
font_02_sfnt_off00011e76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E76 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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