Malicious PDF — malware analysis report

Static analysis result for SHA-256 7833732976c4db81…

MALICIOUS

PDF

77.3 KB Created: 2021-03-29 10:03:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef2280fa939585120a6acb91f6fcf8fe SHA-1: abc161005340e4ac4ac5a2d83232b9391b26f616 SHA-256: 7833732976c4db81d26f315fc2dbce619726ddf56a4aa7a93800d3c74a20c06c
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. The embedded URL, https://jumiwimov.ru/wix?keyword=norm+macdonald+book+pdf, is presented as a lure for a book download, which is a common social engineering tactic. No scripts were extracted, but the PDF structure and embedded URI suggest an attempt to trick the user into visiting a malicious site.

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/wix?keyword=norm+macdonald+book+pdf
    • https://cdn-cms.f-static.net/uploads/4370288/normal_5fda5f5d43702.pdf
    • https://xajimago.weebly.com/uploads/1/3/0/8/130813364/nesididafep.pdf
    • https://static.s123-cdn-static.com/uploads/4381532/normal_600554598d701.pdf
    • https://cdn.sqhk.co/zidulibu/Ynhcphc/17874017736.pdf
    • https://galewijukinez.weebly.com/uploads/1/3/2/6/132695540/xebugubipilaxuvi.pdf
    • https://wewowalowumuv.weebly.com/uploads/1/3/4/0/134040384/eaefbca.pdf
    • https://cdn-cms.f-static.net/uploads/4456377/normal_5fd63c7436b86.pdf
    • https://cdn-cms.f-static.net/uploads/4458163/normal_60615636293f6.pdf
    • https://cdn-cms.f-static.net/uploads/4471996/normal_60275973ac63a.pdf
    • https://cdn.sqhk.co/kuwusemob/jathiji/tigesavezodavawazezodoju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bojaxonilitivaj.rf.gd/uniden_trunktracker_iii_bct8_manual.pdf
    • https://99b08629-27b2-41dd-83a1-938dc2ca35bd.filesusr.com/ugd/067ecb_95e0e16bf22644db828eaf849f2c7c36.pdf?index=true
    • https://s3.amazonaws.com/dazifozixawus/42853341021.pdf
    • http://torowenakatum.epizy.com/64329518228.pdf
    • http://fukasutatota.rf.gd/hydrating_sheet_mask_boots.pdf
    • http://tefadipa.epizy.com/duradowefixef.pdf
    • https://s3.amazonaws.com/xefezesebusu/personal_finances_spreadsheet_template.pdf
    • https://297de083-771a-4730-a3b8-a2afe8c7d209.filesusr.com/ugd/47424f_78d463df47404727bdfc3309bf6cb6eb.pdf?index=true
    • 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_off0000f0ae.bin
128702a4c8673ab55bb20a343f9219fdecb6d8ca7e066ca125ed7ea2eef85cb9
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AE 5296 bytes
font_01_sfnt_off0001029b.bin
5ee2e5f3339d53c670bedc93721d24c18f105b44bee2d9f50fa274f3c5795ada
pdf-font-stream PDF embedded font (sfnt) at offset 0x1029B 11064 bytes