Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc2033859f251255…

MALICIOUS

PDF

86.6 KB Created: 2021-09-04 05:42:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 83482bcc69d398c1642528723ba3230a SHA-1: 3bc87c5285719649e235c9235a281a1807faec35 SHA-256: cc2033859f251255ae7ae9e6b1ca4e450344ade1cda57a85340518be0a300ef7
156 Risk Score

Malware Insights

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

The file was identified as malicious by a machine learning classifier and ClamAV, flagging it as a phishing trojan. Numerous heuristics indicate the PDF contains a link farm pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The embedded URLs, such as 'https://drafthe.ru/uplcv?utm_term=horus+heresy+model+masterclass+pdf', are likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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=horus+heresy+model+masterclass+pdf PDF link annotation
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/009d1a41ffb1d219100c4173a933fcb1/11479315551.pdfIn PDF document text
    • http://vektorma.ru/uploads/assets/file/62375349006.pdfIn PDF document text
    • https://fleschimmo.lu/userfiles/files/vumibilofesa.pdfIn PDF document text
    • http://ladyqueen.it/userfiles/files/3154060173.pdfIn PDF document text
    • http://atreve.eu/ubezpiecz/obrazy/file/fimatezu.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5e066355c1433179cff0f72334783b7c/jerofawotitozi.pdfIn PDF document text
    • http://laclonghotel.vn/upload/files/jogifaz.pdfIn PDF document text
    • http://americandeliorder.com/uploads/files/busapuzukij.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160808c6305808---bawobuk.pdfIn PDF document text
    • http://strandedtattoo.com/file/98068160423.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160baede047218---rumevareguwodev.pdfIn PDF document text
    • https://chasehr.in/userfiles/file/26452109735.pdfIn PDF document text
    • http://bestorkate.com/uploads/ckeditor/files/tufugadivufas.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/vulukusijowuxejoximakug.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1609876b8e155f---tixomosulubegasi.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070436f26130---bozuvixekukanasojamubod.pdfIn PDF document text
    • http://stefani.cz/fck/file/besezanuzejelesaza.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/wedibi.pdfIn PDF document text
    • http://sissonne.hu/editor_up/85267810298.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16082d9a1661e8---27096889193.pdfIn PDF document text
    • https://clubesolbra.com/uploads/files/zafurimeminuw.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f80801589---zigimuzu.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16121bfc07706d---33752605188.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607813244286f---vogefonosajikubopegeko.pdfIn PDF document text
    • https://roc.mn/uploads/files/27639432936.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/7ff21548949ae37047a113271a278506/sewokirovajofodivima.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_off0000eaf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF7 10896 bytes
SHA-256: ca6eeb5d7b315ae270ce377c5578578e103c1974efacfa8049c9943d047c30c9
font_01_sfnt_off0001043f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043F 18432 bytes
SHA-256: e935bb54f07ede67e1492f9a7a9e1a20a2395e93467ffa1459f10fc2039e5d71
font_02_sfnt_off00013418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13418 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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