Malicious PDF — malware analysis report

Static analysis result for SHA-256 478dcc59affa8041…

MALICIOUS

PDF

84.3 KB Created: 2021-09-19 17:45:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b604e12ee3af15cee770406d04dddc49 SHA-1: a211428b7818019c4da0f1b423b7f1d971db5d93 SHA-256: 478dcc59affa8041b783adec6c243eac019f3b9310021230bfbb000f65142177
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URLs are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://catamma.ru/uplcv?utm_term=rob+b+hood+full+movie+english PDF link annotation
    • http://vanlysecurity.vn/vanly/album/files/gudalowozopomoposog.pdfIn PDF document text
    • http://biondiairsystem.it/userfiles/files/zuwalugigirano.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/a1cdc2117ee74ba5f54d105293ef938c/88008798762.pdfIn PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/75847107132.pdfIn PDF document text
    • http://xn----dtbsgbucafmmaf.xn--p1ai/servimages/editor/files/tisidaluzixeb.pdfIn PDF document text
    • https://am-system.eu/ckfinder/userfiles/files/88371574417.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134a05b4a721---92060125211.pdfIn PDF document text
    • http://geodeslaboratori.eu/userfiles/files/zinudusajiferakazikax.pdfIn PDF document text
    • https://equalland.com/uploads/File/72769416045.pdfIn PDF document text
    • https://tradegateindia.com/userfiles/file/natenolukaxar.pdfIn PDF document text
    • http://kompletucetnictvi.cz/files/file/81269457513.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/f5edf8b0dd422b3b6dbe2fbe1f01b219/paziporopekim.pdfIn PDF document text
    • http://energy-labels.com/userfiles/file/8491796081.pdfIn PDF document text
    • https://avukat.dnsaktif.net/upload/files/pakuseselog.pdfIn PDF document text
    • http://pc-driver.ru/userfiles/files/74423596914.pdfIn PDF document text
    • https://avflash.nl/upload/files/jasudajawivid.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/vofesuxupasuna.pdfIn PDF document text
    • https://noelex22.org/userfiles/file/40513311407.pdfIn PDF document text
    • http://fapannimario.it/userfiles/files/22403713476.pdfIn PDF document text
    • http://se-ty.com/uploads/userfiles/file/71668359327.pdfIn PDF document text
    • https://greenbins.ca/ckfinder/userfiles/files/1509817383.pdfIn PDF document text
    • http://schokofontaenen.de/idata/81396026257.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/7dccdb2cd3f631cbbdb676aeecd005a5/wavibakudagawunine.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE44 20068 bytes
SHA-256: 73bf548dd36714584efeffe2a2243cc00ee5fde524e82da71ad609506dfd57c8
font_01_sfnt_off0001134b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1134B 10792 bytes
SHA-256: ce7355f930316d588b4a2119d538faea0a0c65307473b9916dda2ef99cc26106
font_02_sfnt_off00012bbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BBF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1