Malicious PDF — malware analysis report

Static analysis result for SHA-256 6492e799cf339699…

MALICIOUS

PDF

101.3 KB Created: 2021-07-01 13:28:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ab31ca95ac64ecc2e4ae6b09380bbd30 SHA-1: d31bf788060fc6ddf31bbdedff8fa6c0d18f69f8 SHA-256: 6492e799cf339699a64752b37ced16180d1e9a7c5fb0536268d42981169fbe1a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/dc021dd70420e9cd072b9e625b88535e/busewena.pdf
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/cc2e7e4102490bf573ad6213c811a95d/77739434007.pdf
    • https://presstone.hu/userfiles/file/72429554655.pdf
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/6af235d03a6564e5f768ae73abba4860/zavewizojojefuwunar.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d268b64cb---99574226995.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab9b806cd8---7553928790.pdf
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/64oe457b6cp3e0u219e2gl5ob3/61723781358.pdf
    • http://xn--80ab1a9a.xn--p1ai/sadm_files/givemavolijatelujugawul.pdf
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/otimeuop5nku38quaiuh5229im/15219549510.pdf
    • http://jrmhandling.nl/upload/file/21194008800.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/1488cbf7cf6f65a7335faa531f0704a9/88348397383.pdf
    • http://naturallabs.de/userfiles/file/pazapipezibulomit.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982be770d98---46583654178.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcc9e18334---27350203714.pdf
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/d05226d3grgf9sb451c2jll411/tupuziguvojuwone.pdf
    • http://musclecar-taps.com/js/upload/files/72658455869.pdf
    • http://copy2d.com/ftp/image/file/neruxabuxoxus.pdf
    • http://elementsgogreen.com/userfiles/file/zerevirinelavogal.pdf
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/dae392db43317c114cbafd8d4e9a767a/47910470701.pdf
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/bdc88f7abf61e2e9a8a5cb601059cad3/40945798867.pdf
    • https://mimpishiosatu.com/contents//files/57886401580.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088ce448c683---19710687637.pdf
    • https://dovolena-jiznicechy.cz/uploads/xikizenopomurig.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16076a611367b0---31968869622.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=watch+younger+uk
    • 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_off000127a3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x127A3 16792 bytes
font_01_sfnt_off00013fb5.bin
e3719b7be1a5accaf5329a768834fd9b9f18f6be6863f973002a7194f08eaf25
pdf-font-stream PDF embedded font (sfnt) at offset 0x13FB5 18492 bytes
font_02_sfnt_off0001709d.bin
757b36212ddfad6b7958d2310b3dd99fe4b36a2dac4fd20f24c9c7856f81f96d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1709D 10500 bytes