Malicious PDF — malware analysis report

Static analysis result for SHA-256 39aabf329d1b3c9d…

MALICIOUS

PDF

67.6 KB Created: 2021-04-17 05:41:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 389d07fba9eb523f6f47c673063b6d18 SHA-1: dcce97bec9e1252d2d3001fc9404f64d3891d09f SHA-256: 39aabf329d1b3c9d5f061ebe15b1bbf3a9b9df9a7c1bc7a59ad3a7f1998571ab
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'https://pelibifir.ru/strik?utm_term=macbeth+act+3+multiple+choice+quiz+pdf', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be related to a quiz, reinforcing the lure aspect.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pelibifir.ru/strik?utm_term=macbeth+act+3+multiple+choice+quiz+pdf
    • https://cdn-cms.f-static.net/uploads/4500895/normal_5fd97e31643e5.pdf
    • https://cdn-cms.f-static.net/uploads/4402503/normal_601b4349230e7.pdf
    • https://wivezinafixozut.weebly.com/uploads/1/3/0/9/130969190/4773565.pdf
    • https://zatitudebijozi.weebly.com/uploads/1/3/4/4/134460539/387d3814858d.pdf
    • https://regisaralox.weebly.com/uploads/1/3/2/6/132681556/delabusixuk_nukidisumezeg_vituzamajida_jujesikiwa.pdf
    • https://kolojadulosa.weebly.com/uploads/1/3/1/3/131397946/penagidewe.pdf
    • https://cdn-cms.f-static.net/uploads/4415046/normal_6055876fcecf4.pdf
    • https://static.s123-cdn-static.com/uploads/4468572/normal_5fdefcbf37add.pdf
    • https://cdn-cms.f-static.net/uploads/4446378/normal_601471dd585f6.pdf
    • https://wudajelenap.weebly.com/uploads/1/3/4/4/134470879/a0cbc71fe48c78a.pdf
    • http://levelupguild.com/70312458389139i1.pdf
    • https://poduxerot.weebly.com/uploads/1/3/0/7/130776630/3092877.pdf
    • http://lelekelosutov.getenjoyment.net/kotijaretovuvo.pdf
    • http://experiment.website/senojujopozogetisazuzaditywc49.pdf
    • http://smartcoin.design/lovidumavemidipm6okr.pdf
    • https://cdn-cms.f-static.net/uploads/4445864/normal_5fe74d40bfe3b.pdf
    • http://lienforkid.com/south_african_choral_music_songszy0s3.pdf
    • http://7gusevshop.website/39527998109e0djp.pdf
    • https://cdn-cms.f-static.net/uploads/4370077/normal_5fe8fb5925064.pdf
    • https://static.s123-cdn-static.com/uploads/4388274/normal_5fc60972816af.pdf
    • https://bimozasobo.weebly.com/uploads/1/3/1/3/131398313/jijapas-wipafupexa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vawirir.atwebpages.com/kawezivetonuwoka.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_off0000cb09.bin
cd68b11a0d6bd59efb3da8c141e99d4bbcfe5efa5e6c5f1ec9d9b0ba0badb7fe
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB09 5608 bytes
font_01_sfnt_off0000de07.bin
a204f574132b04b341c9748308915efca02710ecae5b540ffaa07a2cb799e6e9
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE07 10188 bytes