Malicious PDF — malware analysis report

Static analysis result for SHA-256 00d3ccae4edddb47…

MALICIOUS

PDF

81.9 KB Created: 2021-09-15 10:07:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bfbbcfd16bd53e30eb725233e3b02944 SHA-1: 267d25a9d9da9e7f90f20d30d16209508bb4eadc SHA-256: 00d3ccae4edddb4729138f53b4c2466aa177362fa9c358da4b80dcbf5e55c79c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous URLs, many of which are part of link farms hosted on potentially compromised or disposable domains, suggesting an attempt to direct users to malicious content. The presence of a 'callback phishing phone lure' heuristic further indicates a social engineering attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://huntic.ru/uplcv?utm_term=marvel+vs+capcom+3+download+for+android
    • http://ozgu-yapi.com/firma/files/25861277892.pdf
    • http://trungtamdaykem.vn/Images_upload/files/mofunilusepuniwir.pdf
    • http://decaldankinh.net/upload/files/werubodiwugukipapuzo.pdf
    • http://stmrcstvm.com/userfiles/file/rijepumamuwanikofiwonowux.pdf
    • https://ochronaskory.pl/pliki_user/File/93773262925.pdf
    • https://sdhouse.info/ckfinder/userfiles/files/zixirabadoxujatufo.pdf
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/cfc0db82f2062862faddea8f31a59e6f/33628451798.pdf
    • http://ntouioc.ntou.edu.tw/ckfinder/userfiles/files/baniwikose.pdf
    • http://resetimpianti.it/reset/public/file/pukuvisarovenumubujadusok.pdf
    • http://ct-tci.com/cttax/userfiles/files/kovemozorariw.pdf
    • http://ecompletecontact.com/ckfinder/userfiles/files/74853883910.pdf
    • https://albertoangel.sinecsas.com/ckfinder/userfiles/files/depizafosakapin.pdf
    • http://www.propper-droppers.nl/files/file/91442100856.pdf
    • https://rmp-familienanzeigen.de/cms/files/riwopo.pdf
    • https://perfecthospitals.com/ckfinder/userfiles/files/44441504676.pdf
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b53094cbb4---jaburewakepegupotazijex.pdf
    • http://chapelguild.com/images/usr/xosunepovove.pdf
    • https://newshieldinsurance.com/demo/gsa/final/images/file/91881904854.pdf
    • http://envigest.cz/upload/file/wonuviwuparojotuxumoxuk.pdf
    • http://branonperformance.com/ckfinder/userfiles/files/57075050801.pdf
    • http://girisimcilikproje.com/resimler/files/4857178071.pdf
    • http://seoulsquare.com/userfiles/file/81598023256.pdf
    • https://tapetcenter.ro/app/webroot/files/userfiles/files/balemidasodesuvoxewif.pdf
    • https://abzesolar.com/uploads/files/62940278514.pdf
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613150fe76222---pifova.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db98.bin
c7e6433943ce93edc69d4f5b131f816158067ad2459c77b190318361c1fc56a1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB98 11000 bytes
font_01_sfnt_off0000f535.bin
4f020f870c908f0f4c19ee1fe54e81fa8e78db5ff16288fd6619e573727a0f57
pdf-font-stream PDF embedded font (sfnt) at offset 0xF535 17072 bytes
font_02_sfnt_off00012172.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12172 16792 bytes