Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c2dae0f11ec8546…

MALICIOUS

PDF

75.4 KB Created: 2021-03-30 17:45:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b994c09a9fe4cba641111739870702ce SHA-1: e0bd4a4b7a469ee617ab3776939d5dd7c8a28fcf SHA-256: 9c2dae0f11ec854621c3b25adbab18d0e11b15e1db5b0e8a2a19b905f2fa9528
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, disguised as a 'Javascript regex cheat sheet' in the document body. The presence of external URIs and the nature of the detection suggest it's a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=javascript+regex+cheat+sheet PDF link annotation
    • http://mazanatur.space/460884497317r2sv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408584/normal_60291b23df486.pdfIn PDF document text
    • http://fbdirect.site/234405210635cuq.pdfIn PDF document text
    • http://baltika-trans.com/trane_furnace_pilot_light_wont_stay_litpfx4p.pdfIn PDF document text
    • http://mazers.fun/76872559291i3mtm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478148/normal_5fe8ed6ec87b0.pdfIn PDF document text
    • https://cdn.sqhk.co/xumesapaxoku/giigjfN/zakuvipe.pdfIn PDF document text
    • https://cdn.sqhk.co/zotipimesaza/jP2gcEm/game_studio_creator_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/kasesiseb/jhengis/juegos_de_highway_bike_simulator.pdfIn PDF document text
    • http://sovetnik53.ru/wakinelusabegqlr61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372383/normal_5fd7d41818fd3.pdfIn PDF document text
    • http://kataeta.club/767660100hkzkc.pdfIn PDF document text
    • https://cdn.sqhk.co/libobivole/hgheruO/necromancer_dnd_5e.pdfIn PDF document text
    • https://cdn.sqhk.co/titesojijuko/hjij1gi/15808602469.pdfIn PDF document text
    • http://idslim-italia.site/nano3_ionic_or_covalent_bond614o1.pdfIn PDF document text
    • https://cdn.sqhk.co/jowoluguwoge/ggvu2dK/zizujifofudovogofanenetel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/geometrical_optics_experiment_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/toxezekililumixugu.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/kuzuvusasoge.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/52738519907.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/rebavakabakigasoku.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_off0000e717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE717 5280 bytes
SHA-256: 585ecfef5a56a848f9c3c41a0a633fe937ed66d24fa446aa5756624a27c667d3
font_01_sfnt_off0000f915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF915 11508 bytes
SHA-256: e6df82823fbed36a01e8e4806bd51a3ffd0462775b9a6534388c387e23b541d0

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