Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a4f097bece40e6…

MALICIOUS

PDF

100.2 KB Created: 2021-06-28 02:15:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 4e8192dfdea606841f2095c57d766f48 SHA-1: 9bbb49aa5efb13d58ada2e0421d93e47e4dad9e1 SHA-256: 02a4f097bece40e6ac0810c87d4570a9bcc7df620ef4d449db83f08c3c030bc7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which are hosted on compromised CMS uploads or disposable hosting, forming a link farm. The embedded JavaScript likely serves to obfuscate the malicious intent or to directly execute further malicious actions. The presence of these elements, combined with ClamAV detection and ML flagging, strongly indicates a malicious phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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.
  • 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://inwebjor.ru/uplcv?utm_term=normal+force+calculator+inclined+plane PDF link annotation
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/cde34ef0f5c3aba34ab2c2af8c7adb7c/13532731529.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/dusod.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1926e2c96---sirun.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/85650622331.pdfIn PDF document text
    • http://c-amc.com/upload/files/durokejo.pdfIn PDF document text
    • http://mtcclassof81.com/clients/0/0a/0a45bd3013a8cc77df817aa526a911b1/File/51415200498.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/12c8cc112dd7fc4ff1a4336afb8a7945/tijurajiravavoxe.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/p1s4sa466refrmv99c0d2h5kjs/mafixirofebedumara.pdfIn PDF document text
    • http://pitin-akutsu.com/js/upload/files/30596467840.pdfIn PDF document text
    • http://bouncebodysupplements.com/newerac2c/userfiles/file/jetabenub.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/63dsdtd3rpfgns72lvj1a0mr9r/xotigofutotunizugepepew.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/53a50acd68e4408715e8e290f22ba4ca/15340930730.pdfIn PDF document text
    • http://alltechsro.cz/files/10530157512.pdfIn PDF document text
    • http://gwardiajuvenia.pl/zdjecia/fck/file/76655512964.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/o2h857gkjpj15bt003s8klak17/51405111952.pdfIn PDF document text
    • https://motacademy.it/file/tamoja.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///41444452818.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/romakoxolupodezil.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160850cbb5841f---sibujomixawexenibidila.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/d3a11917561cf023c36bb999502ff08c/ruwiworilem.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/2dmibtkd100ddhl6elvuhc2qmh/49759797637.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/15604358503.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_off0001219e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1219E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000139b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139B5 10688 bytes
SHA-256: 7f6c60996ee530c3cf983e2c497e1652ac53841b18b8a37d9f3ebaff25f4b242
font_02_sfnt_off00015226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15226 17956 bytes
SHA-256: 1dcd6d0405c8acb988a3a113d750eff7dceb21cd469a084f23b48d854b37ff7f