Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd6dacc2de9f921a…

MALICIOUS

PDF

69.0 KB Created: 2021-09-28 06:57:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7ad844459a95f02fa69963c2dfaebf9c SHA-1: 9a0c1b3910ccd8da3a285ce8a12919d5b0068e9e SHA-256: fd6dacc2de9f921ab3edc9da67a62fbe846da05c6a40130620d32b84bd5a85d2
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://pyccenter.com/images/Upload/file/70952272420.pdf In PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/5610641119600ed9843c4ff091f7b6f0/53878971461.pdfIn PDF document text
    • http://artdealer.vn/upload/fckimagesfile/e95be304ba611122af5ed00feb9049e6.pdfIn PDF document text
    • http://hissekurban.com/resimler/files/wariteperagefaj.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/56932098054.pdfIn PDF document text
    • http://xfswchem.com/upload/files/pogufilawolamo.pdfIn PDF document text
    • https://imagebuzz.net/ckfinder/userfiles/files/nadopezixeg.pdfIn PDF document text
    • https://aildf.in/userfiles/file/46021886502.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/e3552394f6c489e3ac0afa368b763a4e/87187757676.pdfIn PDF document text
    • https://casasholidays.com/scgtest/team-explore/uploads/files/beriwu.pdfIn PDF document text
    • https://pergamine.com/ckfinder/userfiles/files/bizagunivurariradajowiveb.pdfIn PDF document text
    • http://sqc.jp/user_data/editor/ckfinder/core/connector/php/upload/files/vudupas.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/zinazedotovibaw.pdfIn PDF document text
    • http://studiotecnicobonoli.com/userfiles/files/9497601508.pdfIn PDF document text
    • http://timnhanhonline.net/upload/files/52525051259.pdfIn PDF document text
    • http://evopizza.lt/ckfinder/userfiles/files/bilogomosisodosaxunetodow.pdfIn PDF document text
    • http://parcroyale.hk/userfiles/jepewizusixelasimeritev.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/ff3c70e4ccafbd9b12cb7c7488dc5c33/nolevipawiviwamedutaguta.pdfIn PDF document text
    • https://elemonbg.com/Files/File/panudexadubopefepeguner.pdfIn PDF document text
    • https://amoslodge10.org/ckfinder/userfiles/files/dakejawov.pdfIn PDF document text
    • http://architetturaurbanistica.it/userfiles/files/60518880157.pdfIn PDF document text
    • https://jsptti.com/ckeditor/ckfinder/userfiles/files/pifesusad.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/161457fd824c99---zefilexujojufudenaxakefon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=mod+apk+fifa+20+mobilePDF 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_off0000b274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB274 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA8B 10656 bytes
SHA-256: 0e66821da6307b8e96cf828844482dffc8ecc5887409b22fecdd90c7a6ded301
font_02_sfnt_off0000e2b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B4 14336 bytes
SHA-256: b20d46b45e765e9a5adc92a5e11d9bd1408c2e38960c29510b2aa145975ec45d