Malicious PDF — malware analysis report

Static analysis result for SHA-256 cde7aacb8c4a6aaf…

MALICIOUS

PDF

90.0 KB Created: 2021-06-27 21:55:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 77ac267f54ec65969754cac5f1288e47 SHA-1: 66b5b6e2958a78030b1679d2e3ebdf3dd5b62de5 SHA-256: cde7aacb8c4a6aafdb5fe7247cee34ca74d362fca3d9e5d53734ab8ee61cf418
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URIs pointing to various websites, many of which appear to be compromised WordPress installations. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded URLs suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • 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://huntic.ru/uplcv?utm_term=coc+town+hall+6
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/492362de39e729172f45abb7950dceeb/16240427686.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/ce17f0555b37d752669d3a30075a29ad/84964758527.pdf
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/juki15190ls6bpuut9cfivi231/5845010914.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d00bf921558---panimedutojalo.pdf
    • http://kapelski.pl/userfiles/file/32853122669.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16096baebb5f0c---36948834143.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/6b1e49561da811a036b11419cb4d87f2/pasipobizigakotapabuzugi.pdf
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/8t9l4kkhh933nmaube6bb7pq2b/17551215532.pdf
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/201b5c556195893561be44b1c1bc8743/sibenop.pdf
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/kutigov.pdf
    • http://biosite.ru/images/news/file/vazesuxujujufum.pdf
    • http://adamlegal.com/userfiles/file/1950843439.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/tfp00opvhrecdcoug20c53lp73/sixudetilokeremojikujop.pdf
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/cge0b9fei9ssnkbg8fdggkf6bp/75988707033.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b297ac3087---43022436556.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1608ece36d2b55---walazeworev.pdf
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/fa56cc2f5f4ea015fc9a251918bffa0c/lokux.pdf
    • http://youandisagenix.com/ckfinder/userfiles/files/39323803142.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9800b28aa---46478278591.pdf
    • https://dallaslandscapedesign.com/media/files/goriludejomumovexetilav.pdf
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/fb4ed5a20e1d6343dea7bd5a426482d0/fosufovobepo.pdf
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/8983485278.pdf
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160baef1ba3521---7121580968.pdf
    • http://agrion.org/upload/fichier/22514150678.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_off0000f52e.bin
3551b24950c96554f1a3031b9e6637259024af59e354915c1c8c039b39fd6872
pdf-font-stream PDF embedded font (sfnt) at offset 0xF52E 10120 bytes
font_01_sfnt_off00010bd0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD0 16792 bytes
font_02_sfnt_off000123e2.bin
9362c6a5a73132a3d3cc589bf13aa4ba607fe6215901a31fc1381a08663459ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x123E2 22136 bytes