Malicious PDF — malware analysis report

Static analysis result for SHA-256 98dddc92f6a3985e…

MALICIOUS

PDF

70.4 KB Created: 2021-10-03 01:38:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 02eb6757ed8a8e64b1badbbfe6b0d19f SHA-1: 04e4277b19b742ae3084a332ecd37338191a67a4 SHA-256: 98dddc92f6a3985ee53719f515daacf30e0bbfed32eec638942798eacaae81fa
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to a link farm hosted on disposable domains, a common tactic for phishing or distributing further malware. The PDF structure and embedded content suggest it is designed to exploit vulnerabilities or trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://praguynakorn.com/praguynakorn/picture/datapro/files/785666225.pdf In PDF document text
    • http://grawerlik.pl/userfiles/file/duzezatamar.pdfIn PDF document text
    • http://fvv-hohenfelde.de/sites/default/files/files/javavus.pdfIn PDF document text
    • http://sanzmendia.com/userfiles/files/poxelowurofefedijuvukesos.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/95345649689.pdfIn PDF document text
    • http://tandartsindex.nl/images/uploads/lesawujezetupevanodilupim.pdfIn PDF document text
    • http://naszymsladem.pl/upload/file/logixamurebebeve.pdfIn PDF document text
    • http://babijie.com/upload_fck/file/2021-9-24/20210924202643720463.pdfIn PDF document text
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/kerijoraw.pdfIn PDF document text
    • http://xn--90aoa5aj.xn--p1ai/ckfinder/userfiles/files/97327393910.pdfIn PDF document text
    • https://ladangmimpi2.com/contents/files/49458737050.pdfIn PDF document text
    • http://northcity.rs/slike/files/muwotadamifemoxugu.pdfIn PDF document text
    • http://www.vljainandco.com/userfiles/files/pitumiwodetevaliwig.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/52905233133.pdfIn PDF document text
    • https://treasurehunterdetectors.solar-ovens.net/ckfinder/userfiles/files/mubawitufigibedusin.pdfIn PDF document text
    • http://www.gitialiganjlko.org/ckfinder/userfiles/files/sedoxusiwanitosodirasef.pdfIn PDF document text
    • https://pastravariaizvoarelebratiei.ro/images/file/jominubogoxepodopitagomax.pdfIn PDF document text
    • http://reafamily.lt/ckfinder/userfiles/files/gelep.pdfIn PDF document text
    • http://bigyikesmedia.com/home/xtremweb/public_html/consultinstitute/web/upload/files/tilegutexosepuwa.pdfIn PDF document text
    • http://honghuibio.com/d/files/zubifetedinazi.pdfIn PDF document text
    • https://maritime-models.com/userfiles/file/vuzijelezunogodemubow.pdfIn PDF document text
    • https://suprastoc.ro/userfiles/file/66403681316.pdfIn PDF document text
    • http://abwninemile.com/uploads/files/66503028451.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=daily+deliverance+prayerPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE3 16472 bytes
SHA-256: 6a033581b7a51e710a989f264ce9aff9fa6cad731ac2df65c96849c88e3a9bfc
font_02_sfnt_off0000f4ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AB 10304 bytes
SHA-256: 32ea16ec9a8c260ca475723db859820c632f39f2c741898923fae4121dadd2c3

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