Malicious PDF — malware analysis report

Static analysis result for SHA-256 d596d9591297d43f…

MALICIOUS

PDF

86.7 KB Created: 2021-09-09 01:13:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d8b987f98098ba0127873a610e353f2b SHA-1: 262c934de662a4eb3abe3512110498f2c2bf7088 SHA-256: d596d9591297d43f3e2d2c57299748207063bfb1f2f86f0b9dc3c72602a7799d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are likely used to redirect users to malicious sites or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing or malware distribution campaign. No scripts were extracted, but the structure suggests it's designed to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://skpizzasubs.com/uploads/files/dukarelojesezofizenu.pdf In PDF document text
    • https://upbfassadenbau.com/upload/file/35329059144.pdfIn PDF document text
    • http://cpviettin.com/upload/files/48285292877.pdfIn PDF document text
    • http://luxmeterthai.com/ckfinder/userfiles/files/kifodazixijizidev.pdfIn PDF document text
    • http://ideviceplus.nl/app/webroot/files/userfiles/files/fixonefi.pdfIn PDF document text
    • https://ceccardolj.ro/userfiles/file/17815005198.pdfIn PDF document text
    • http://mn-print.ru/ckfinder/userfiles/files/xutesifafotaduxezugur.pdfIn PDF document text
    • https://westhygiene.hu/editor_up/74834091986.pdfIn PDF document text
    • http://sladkiy-ostrov.ru/userfiles/files/28977735626.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///66314246095.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///luxiri.pdfIn PDF document text
    • https://noddy.nu/images/file/favepokivojiresomomesakox.pdfIn PDF document text
    • https://eurosan.pl/user_images/file/gikugokimedomov.pdfIn PDF document text
    • https://foodexgida.com/uploads/files/ditebazavefobadujenizi.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1ae219cda---72118775763.pdfIn PDF document text
    • https://dnmpaint.com/sdcc/images/file/luzonupod.pdfIn PDF document text
    • http://caopump.com/admin/userfiles/file/79540647794.pdfIn PDF document text
    • http://huabulaw.com/uploadpic/2021-9/file/2021090207461073499.pdfIn PDF document text
    • https://ls-machinery.com/uploadpic/files/202109041557243771.pdfIn PDF document text
    • https://seger.cz/userfiles/file/panuvo.pdfIn PDF document text
    • https://ietc-oman.saktoon.com/userfiles/files/zuvosexajupidujizam.pdfIn PDF document text
    • https://hung168.tw/UserFiles/files/52607833042.pdfIn PDF document text
    • http://bjsddesign.com/filespath/files/20210908153657.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/42833710702.pdfIn PDF document text
    • http://munnartourism.com/uploads/file/92822550667.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=how+do+i+connect+my+phonePDF 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_off0000f04c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04C 10492 bytes
SHA-256: 2409ecb56c2d63e903aeeaef86f892eeed9d9e9326d5dd37132828099e7529a3
font_01_sfnt_off000107ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107EA 17436 bytes
SHA-256: 691857f65d1a96692b4b66782c280f34b36d99e906eecbc1840a5471d8564b1f
font_02_sfnt_off00013531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13531 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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