Malicious PDF — malware analysis report

Static analysis result for SHA-256 58017fae19d99719…

MALICIOUS

PDF

95.8 KB Created: 2021-07-20 01:04:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 480657d47b524dfd8abfd94deba07203 SHA-1: a35b39fbe5d58bd9fb779690c6319ff0a57ee3ab SHA-256: 58017fae19d9971996e85099dd1b34fa4266e5c63f7fada90831e3682a9a25f7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://xlspandoek.nl/userfiles/file/97059565967.pdf
    • https://alrashed-alsaleh.com/userfiles/files/20024349027.pdf
    • http://htwy.com/upload/file/gerigup.pdf
    • http://amphorabeautyclub.com/campannas/file/43479090607.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606d30f2eb229---58482886889.pdf
    • http://kcde.kr/userfiles/file/tixumuxexidopivomo.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/einalc6p067pook69n7h0dl8b7/33064166240.pdf
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/ndp6r8u7r39f070gagcj5neek6/72200373575.pdf
    • https://gea99.com/ckfinder/userfiles/files/vetabedonekuponison.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a470913c66d---dejevibakugozogidunetow.pdf
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/6dit4s8320vni7flv154qmo8ig/nasasituxufasilopebodez.pdf
    • https://htddienstverlening.nl/userfiles/file/92025356321.pdf
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160814a4eb7a84---nigiliraroputenari.pdf
    • http://thepokewave.com/uploads/files/rokonu.pdf
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/37758c425154fe0fbc3a4b41336cc2a3/jebowufabozaposos.pdf
    • http://alphabodysupplements.com/newerac2c/userfiles/file/49148089122.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/9crq53uga669d1pn2r45tisoj7/54915571311.pdf
    • https://faresaldabbous.com/uploads/files/jonivijipapagi.pdf
    • http://jirehenl.com/userfiles/file/230124317716.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160861c66eae0a---tivugut.pdf
    • http://119pump.net/d/files/12808134253.pdf
    • https://farmstead.tw/farmstead/upload/files/golanegewutige.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d40d4e0a831---53816163603.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/rs09fju3rhdm72qf5rhnhkjds0/47942121584.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=previous+surname+meaning
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096a00209a68---38056029785.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_off00011619.bin
0c3dd7df133f89adb6bd7b944a5c9c3b97f3c0765daacfba254bbe29df98dacc
pdf-font-stream PDF embedded font (sfnt) at offset 0x11619 10476 bytes
font_01_sfnt_off00012de7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DE7 16792 bytes
font_02_sfnt_off000145f9.bin
e8af2a21aa5a76737007bba952b1e7b2b19844bf24abb09ef07dab73cedddc88
pdf-font-stream PDF embedded font (sfnt) at offset 0x145F9 17076 bytes