Malicious PDF — malware analysis report

Static analysis result for SHA-256 38c615bb99bf1982…

MALICIOUS

PDF

76.9 KB Created: 2021-03-14 04:43:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 750877ca9e8bcd5d0584a2d699599758 SHA-1: 767e6d7c27cd0ba0defbe7badc646619afe1e7a7 SHA-256: 38c615bb99bf1982ee8e2389ab22947d0ebf08e779838baec11c896460c0ba5f
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL that directs users to a suspicious domain, likely for downloading further malicious content. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was generated programmatically to appear as a legitimate document.

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://botokaw.ru/award?keyword=anderson+bridge+practical+pdf
    • https://cdn.sqhk.co/mepapogivoma/cfzheh5/jarume.pdf
    • https://cdn-cms.f-static.net/uploads/4464735/normal_604772a513861.pdf
    • https://jezonekapinojel.weebly.com/uploads/1/3/4/6/134619201/27e5b0.pdf
    • https://cdn-cms.f-static.net/uploads/4383917/normal_60445df0b7a81.pdf
    • https://tajewarupimef.weebly.com/uploads/1/3/2/6/132681391/xevudev.pdf
    • https://zotagozugub.weebly.com/uploads/1/3/0/7/130739891/kabojakirozen-tajubojak-paviniva.pdf
    • https://cdn.sqhk.co/vonofuguniti/ZggVhin/business_impact_analysis_easy_definition.pdf
    • https://cdn.sqhk.co/tidaxetosi/B65Siho/difference_between_race_and_ethnicity.pdf
    • https://fomilapemarujan.weebly.com/uploads/1/3/0/8/130814088/werew_rimewi_saxiruke_potida.pdf
    • http://rixorevu.getenjoyment.net/yasin_dan_tahlil_ringkas.pdf
    • https://cdn.sqhk.co/tubadaluzafu/wibE2hf/61656013448.pdf
    • https://cdn.sqhk.co/wakewafo/ihbhejf/83791073967.pdf
    • http://nubuxeki.scienceontheweb.net/83144622562.pdf
    • https://kokarino.weebly.com/uploads/1/3/5/2/135299240/7867488.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/ebccfe8f-cdd3-442e-9688-fb2e431cae88/ross_stores_open_mesa_az.pdf
    • http://mijovutotukedes.onlinewebshop.net/kojijejadixesevezijike.pdf
    • https://uploads.strikinglycdn.com/files/d8c411f3-196a-4cb9-89fc-bbe7cc0aedc8/the_mandalorian_cast_episode_4.pdf
    • http://gikiwajufekozi.rf.gd/vermont_casting_encore_price.pdf
    • http://navadolaje.rf.gd/2012_chevy_impala_oil_capacity.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e01b.bin
4116c351781fa8845779eacfc4b6b06b6e802047c0eba02be83710952fd8a3da
pdf-font-stream PDF embedded font (sfnt) at offset 0xE01B 5240 bytes
font_01_sfnt_off0000f1e9.bin
c5ddc0d9db8bf50d0e29231b6ccc44b3663495a778db3e3ebdb764a2d8430953
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E9 10672 bytes
font_02_sfnt_off00011653.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x11653 4324 bytes