Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f500a051a12e82a…

MALICIOUS

PDF

69.9 KB Created: 2021-09-28 05:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0589680122c059051b103dbfbddad192 SHA-1: 8fb7afeb0856ea9d9c3c45c4c1700c74cc9038c5 SHA-256: 0f500a051a12e82a8e6b24c7d4a9ceee546e4f175b708656d69d5fdf8cd1f87c
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised CMS uploads or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://drafthe.ru/uplcv?utm_term=pokemon+stadium+n64+rom PDF link annotation
    • http://hongdacable.com/d/files/25183082934.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16130e891b275d---xetikapavunawig.pdfIn PDF document text
    • https://safe-international.com/userfiles/file/53563852426.pdfIn PDF document text
    • http://condominiobrisasdelnorte.com/userfiles/file/wukutopitawedikutibuwa.pdfIn PDF document text
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/56832128683.pdfIn PDF document text
    • https://birotex.rs/images/files/86245782140.pdfIn PDF document text
    • https://nls.vn/upload/files/67093465652.pdfIn PDF document text
    • http://amandatour.ru/js/ckfinder/userfiles/files/nojebusigugutibevomib.pdfIn PDF document text
    • http://amunt.madteam.net/ckfinder/userfiles/files/dipopukojutusuvajimidarop.pdfIn PDF document text
    • http://lulanjina.net/upload/files/81787506895.pdfIn PDF document text
    • https://eric-parnes.com/ckfinder/userfiles/files/7790181713.pdfIn PDF document text
    • http://minipit.com/data/files/99236533474.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1612f3245086fb---15246380319.pdfIn PDF document text
    • http://knshzj.com/CKEdit/upload/files/91701708217.pdfIn PDF document text
    • http://stepasidemedical.ie/images/uploads/file/betaji.pdfIn PDF document text
    • https://zagi.hr/files/negifiba.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/93318262849.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021091601464426.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f2db7984bc---bibirile.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/0bfb33f0f177ebe5cabc05f75fc2475b/61034806406.pdfIn PDF document text
    • http://apple888.vn/luutru/files/wexuxoxadunimexerox.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/f03f357692eea854c10dadf5d36f53f1/84226584936.pdfIn PDF document text
    • https://varbackaforskola.se/ckfinder/userfiles/files/95852163632.pdfIn PDF document text
    • https://olivier-daulte.com/ckfinder/userfiles/files/84766610164.pdfIn PDF document text
    • http://sgadsahodayatarntaran.org/sahodyatarntarannew/userfiles/file/rafewef.pdfIn PDF document text
    • 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_off0000b489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB489 10800 bytes
SHA-256: 6cf6c45e82493bc17f728a8184a56f31e1a0bcc2ddf32522d7b4fefcfc48abc5
font_01_sfnt_off0000cd88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e59a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59A 14336 bytes
SHA-256: bac8111a6a54d7ee4320f634be25495e68e0912895051881aa49223ececd769b