Malicious PDF — malware analysis report

Static analysis result for SHA-256 8780965bd407f50f…

MALICIOUS

PDF

94.9 KB Created: 2021-05-25 16:40:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56792a3b0eb8859093da370ebfe7db28 SHA-1: eeb135f9384ab17174a7955bb317b9befd064f87 SHA-256: 8780965bd407f50fabc8b39e9c5cc5e9d2a6a05185eaedc277ace745964e9f0d
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that leads to a suspicious domain, likely intended to host a phishing page or a further stage of the attack. The document body, though heavily obfuscated, contains keywords related to the URL, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/strik?utm_term=quistes+de+blastocystis+hominis+que+es
    • https://static.s123-cdn-static.com/uploads/4387430/normal_5ff65a453b3dd.pdf
    • https://cdn-cms.f-static.net/uploads/4446270/normal_6067c9ba3a8a7.pdf
    • https://cdn-cms.f-static.net/uploads/4423780/normal_5fd27e048c099.pdf
    • https://cdn-cms.f-static.net/uploads/4369901/normal_6024153477079.pdf
    • https://cdn-cms.f-static.net/uploads/4464311/normal_603a7045e26b1.pdf
    • https://cdn-cms.f-static.net/uploads/4448536/normal_6012dd10cd5ae.pdf
    • https://static.s123-cdn-static.com/uploads/4473616/normal_5fdedff8d45a5.pdf
    • https://static.s123-cdn-static.com/uploads/4477863/normal_5ffcb29900d51.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tajimipojimo/5907603439.pdf
    • https://uploads.strikinglycdn.com/files/cf2506cd-fc0f-4c7e-b5d7-5d99b84e6e5a/berifuvigiliridiwipokefa.pdf
    • https://uploads.strikinglycdn.com/files/511517e1-fb50-43d2-bed0-8f0e2b43f8a3/vuwadisodudijebemimugumus.pdf
    • https://s3.amazonaws.com/rodakarugupoko/tawikaxosamagimidutu.pdf
    • https://s3.amazonaws.com/jepinebawo/vikanusebusenuzorapuraz.pdf
    • https://s3.amazonaws.com/pesetufavo/vehicle_check_sheet_app.pdf
    • https://s3.amazonaws.com/lowebemuwojiso/rokukunaloxoxaz.pdf
    • https://s3.amazonaws.com/garorowa/47212441284.pdf
    • https://uploads.strikinglycdn.com/files/3f1c3495-0f4b-4aea-947d-338c0a7349f4/harry_potter_complete_8-film_collection_blu-ray__digital.pdf
    • https://s3.amazonaws.com/kizugokofo/56870585968.pdf
    • https://s3.amazonaws.com/tigewibejageju/macbeth_act_5_comprehension_questions_and_answers.pdf
    • https://s3.amazonaws.com/kosamupim/jelogokelipebudafovu.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_off00013126.bin
d61633fc7d6b67bcf800297106f34816fc29757528b0cdeb72a437e8b068415d
pdf-font-stream PDF embedded font (sfnt) at offset 0x13126 5512 bytes
font_01_sfnt_off000143be.bin
e81e10bbdb479f57bf31ef43d6a501b01b82fd1a33dc8be97817636a8481772f
pdf-font-stream PDF embedded font (sfnt) at offset 0x143BE 12808 bytes