Malicious PDF — malware analysis report

Static analysis result for SHA-256 a70979bb8965dd96…

MALICIOUS

PDF

108.3 KB Created: 2021-07-07 10:06:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 860e9b1850d43ea39930055e7e75a504 SHA-1: b81f7a554df7ae2d1ffb0a7520326342a052ccc8 SHA-256: a70979bb8965dd96fae1d6abc58b0593912562844b80b5e15498dcd0a749f036
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to directing users to malicious content or exploiting vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9780

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 http://nktrading.qa/file/files/58471225063.pdf In PDF document text
    • https://decoveinvestment.com/userfiles/file/49992423059.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/b3f8be4a47e59dbfe1c1aeea35229330/90749764329.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/56bd9o5knldcu3lfpbmoffbe9m/91100564154.pdfIn PDF document text
    • http://cuspsurgeons.com/userfiles/file/gunowovevexejofubudifukax.pdfIn PDF document text
    • http://www.stemcellhairclinic.com/files/files/85959311005.pdfIn PDF document text
    • http://aroma--style.net/files/files/tewewonetoretobafu.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/c5dfb0db54436bad09f89be35e6c6eae/wotivosuj.pdfIn PDF document text
    • http://conflictfreeelectronics.com/ourprojects/chowki/UserFiles/renuka/file/loriwefovovupuz.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/21805cb50902b2c2de108a37ad2004f8/tudikalokagux.pdfIn PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/vebapaketimutemoxo.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/zasafepulijuzefovuve.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b015c7678d5---80363845458.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/sgoi08p636qr7rpmn33139lfa8/mumifosamelavixafude.pdfIn PDF document text
    • http://clairerolo.com/userfiles/file/27408621566.pdfIn PDF document text
    • https://lifecareproduct.in/ckfinder/userfiles/files/90292743457.pdfIn PDF document text
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wejurevozezu.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160e4b37043907---zezigape.pdfIn PDF document text
    • http://newgatedesign.com/Images_upload/files/vewazivegin.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b6a18647fc0---duguxibi.pdfIn PDF document text
    • http://3dprofi.net/images/uploads/file/denidinima.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/59964402643.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab0f037d463---barojomu.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/wojupigapumolu.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/b95da3461b88956b84567dbd4c12f41e/gapadaboja.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6bfeb7e3fc---71402925600.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e27d61546a6---86747569328.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=testicle+out+of+scrotumPDF 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_off00013e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001568c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1568C 20060 bytes
SHA-256: 40835be185f928d479ed5f340c8a22eee9ae16eee19151cc7a10907d3212f458
font_02_sfnt_off00018b31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B31 10296 bytes
SHA-256: 5cfd256277e81bafe993f9a810dfccdb70fe0118e146c3df3644b7fd78a64f87