Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6d57ae5f5151586…

MALICIOUS

PDF

88.6 KB Created: 2021-06-28 23:46:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e820e119d07226474d883d41eab7d53f SHA-1: c920502c6bc55d0fd8f0bff01912416af5caa82f SHA-256: d6d57ae5f51515866974be1bc7e2fbf6c3f70e82e4a347f2c79408a07ce33dc7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or link farms. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are designed to host phishing content or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c20e2a0eb24---wurekopava.pdf
    • https://alcoolassistance-creuse.net/www/site/js/ckfinder/userfiles/files/43100470403.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084408611de3---dojadixuxobigoduvupo.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/2eb490a771460a3b36966d3c696c3f17/61228421487.pdf
    • http://islandpointfl.com/userimages/jaragesati.pdf
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/64eee985a288c6c0b594a4f4628d40ef/fisuvotazixagazuxaje.pdf
    • https://kis-u.com/page_data/file/20210618022224.pdf
    • http://fygl.net/uploads/file/150102166736.pdf
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/880e3ae618ae7ff55e96ad7128e4f3aa/67878711777.pdf
    • https://fablab808.com/nbloom/fckuploads/file/kagobozutulurilevivigugip.pdf
    • http://0-50.ru/userfiles/file/kuremoludetugoki.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbbd6a6d40---lixudimesikimetafipiwag.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/6c5642cd3fba0c33b375e21e5b7ee3a9/jibobixolenezoluxuko.pdf
    • http://abacusnancy.com/userfiles/file/46372186014.pdf
    • http://ebslang.net/_UploadFile/Images/file/28979620627.pdf
    • http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/valutov.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/d8acd7a7fdb63376f48bea5158adea63/nafedegopejugulobowet.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607819a6d01a9---9677602112.pdf
    • http://shinies.ru/img/lib/file/wenege.pdf
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/5j6lg30kl12uj53mabar5pncbj/89969754700.pdf
    • https://lapalettedesarts.fr/gestion/file/fitepuvifuzawuwo.pdf
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/029d6083c318ee846785882743960c16/kekujubutiru.pdf
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1d5e70d61---xekulaf.pdf
    • http://www.uniformsolutionsforyou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca9364089b---dupavajemopama.pdf
    • http://marasintl.com/public/ckfinderuploads/files/zuful.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=values+and+data+types+in+java
    • 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_off0000f588.bin
cc62dc7954910c0c979ba7dd0f2b124ae889ed4e45d22063a5de45d41bd526d8
pdf-font-stream PDF embedded font (sfnt) at offset 0xF588 17968 bytes
font_01_sfnt_off000124f6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x124F6 16792 bytes
font_02_sfnt_off00013d0d.bin
e0c3ac7a0a68d9ba5f27de4217406c1da9f09dbf7aa7099965881d2652d6558d
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D0D 10544 bytes