Malicious PDF — malware analysis report

Static analysis result for SHA-256 be9327ff18a53db1…

MALICIOUS

PDF

85.2 KB Created: 2021-06-11 09:24:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d76b465d5ed3e998adb879ed46f26707 SHA-1: dedab17cedc62ffc014924907fdf0d57de1af936 SHA-256: be9327ff18a53db159b5c1b4dfc2c8784339f04f409c9050551725b476e79264
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains a link farm pointing to compromised WordPress upload directories, suggesting it is used to distribute further malicious content or phishing lures. The embedded URLs, such as 'https://drafthe.ru/uplcv?utm_term=bana+bir+a%25C5%259Fk+%25C5%259Fark%25C4%25B1s%25C4%25B1+s%25C3%25B6yle+filmi+indir', are likely part of this distribution mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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=bana+bir+a%25C5%259Fk+%25C5%259Fark%25C4%25B1s%25C4%25B1+s%25C3%25B6yle+filmi+indir
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160809ec942cbd---33997825028.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608f79cce3099---ruvisudopef.pdf
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a63b80eb9ab---48598228081.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099606f53984---19195840839.pdf
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b112366974d---varenuwuwukomeviridita.pdf
    • http://elitvorota.ru/f/file/negateti.pdf
    • https://loctra.net/userfiles/file/suzutugavogofuwijilida.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/7b6c4b8e8fd67ac6b746584b3e536344/11180098076.pdf
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/aae8decb550879c5437dd8e117918947/katadexedafeze.pdf
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3216dc6d5---94570422156.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/a1a86fb3cf24f0c79f8a6cfbd111c834/vutajepodobeme.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160710091b151c---bufepavofule.pdf
    • https://fuchscars.com/wp-content/plugins/super-forms/uploads/php/files/383ed6327f47cf0667490ffa233526e1/46180584344.pdf
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/a7f5cfa30d48fe798e339b2fe987c511/mivitaparipirizopoloxuta.pdf
    • http://geologocarmignani.com/userfiles/files/10474032746.pdf
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae54c661fc---ruzof.pdf
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc44707715---59201395610.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000126f1.bin
19b956fe0d2c0460d196843a9178aabcf0d4c788f5880a47591d0cf35282270e
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x126F1 18936 bytes
font_00_sfnt_off0000ed54.bin
6e103209adf313862f101900e35fb6d91c34e5e4af2ada6b8e750242ca86b979
pdf-font-stream PDF embedded font (sfnt) at offset 0xED54 5824 bytes
font_01_sfnt_off0001005f.bin
e24a61b27cf65de9cef727027c8dc8073c064ee880a93915c9cb0b23313f6df1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1005F 12208 bytes