Malicious PDF — malware analysis report

Static analysis result for SHA-256 50ce8d70e36c67f5…

MALICIOUS

PDF

94.7 KB Created: 2021-07-02 01:50:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 10f6c5d85e93add51042bca0889754e6 SHA-1: a1b814e9a42c2c3a52d51862a1c7ad8a5309a97c SHA-256: 50ce8d70e36c67f5704276059bddf9b1f5546c4c40ef5952252cae6f31b4c6d6
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, indicative of a link farm used to distribute malicious content. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly suggests the document's purpose is to trick users into believing there are new or changed payment instructions, a common tactic in business email compromise scams. While no scripts were directly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 https://medvor.ru/uplcv?utm_term=reinventing+yourself+pdf
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/74c7ede997a6d83ebffc5f584fc1afd0/nexogobakazabi.pdf
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/falohbbjo9m8bff6l2cgbir96h/45101343311.pdf
    • https://autoprofi.ua/userfiles/file/54572434106.pdf
    • http://pixel-pro.ru/upload/file/livovepagixap.pdf
    • http://www.hydro-tg.pro/upload/file/fegude.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607875ffee1cc---6961423146.pdf
    • http://alexhofford.com/temp/files/file/34465888930.pdf
    • https://valleyrestoration.net/home/apf/public_html/ckfinder/userfiles/files/12806363907.pdf
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/d0227eb6f5d3a1d43b709409670654f2/bumokunapepibipovoko.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078c2c084175---21170114751.pdf
    • http://acecaalcoy.com/userfiles/file/vofozo.pdf
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abc94fcea29---34328320393.pdf
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/tlsa3sk917adaq9cs07t3gv5bb/folojovutowimisovegi.pdf
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/8h5s9eqeb2km5nah6ke6km0bf1/14414015362.pdf
    • http://afgventuregroup.com/cfiles/file/63878021604.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16088c227ce679---8235454864.pdf
    • http://rotang.net/userfiles/file/nipuderekerujulaborejedu.pdf
    • http://pcmcpropertyblog.com/wp-content/plugins/super-forms/uploads/php/files/399495c894c1335c309eed5bc0bee1c7/35161987123.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec62faed91---movadusokawusodu.pdf
    • http://www.cafeinca.com/img/public/contenido/file/60046794217.pdf
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bef98784dde---rigamejegi.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091b90a134e2---pasoroniwetugisiwozijep.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/tcsngj37jvd9ti2h04i6gcfgj3/1947676893.pdf
    • 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_off0001101f.bin
dbca471b9c675d89604da4f0ea2cf8fd6de05aca37d92ee5062cfaa99d27e5e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1101F 17236 bytes
font_01_sfnt_off00013cc7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13CC7 16792 bytes
font_02_sfnt_off000154de.bin
a8d5c5d3b4aa68eb38ec6e5e244aa5af13d27c75899f01959a544b160b6beee2
pdf-font-stream PDF embedded font (sfnt) at offset 0x154DE 10836 bytes