Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbcc02a5c67a21c8…

MALICIOUS

PDF

88.1 KB Created: 2021-09-07 00:34:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 06eae8dc23e2c27d469003d69c6db6c9 SHA-1: 8e84c92ff6401146e0a19fda6bea825ae92baa7a SHA-256: dbcc02a5c67a21c8e58e0b0193c170756ecd8beba582b06816b220e34f627589
176 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that point to a link farm hosted on compromised WordPress sites and disposable domains, suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a malicious second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://medvor.ru/uplcv?utm_term=mapa+san+diego+california+pdf
    • http://ingenermarket.ru/userfiles/60844537466.pdf
    • http://chanakol.com/ckfinder/userfiles/files/85494980460.pdf
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/446830189c7550813ed2b39a949d844d/damabulukojapoxabozefun.pdf
    • http://playeasypiano.com/resources/fck_images/kozapopujemipap.pdf
    • http://sibinetweek.ru/userfiles/file/20360529910.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607791c7a65a7---31961407132.pdf
    • http://simonhoirup.dk/userfiles/file/70158859254.pdf
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/ng97jvkigjqsmvt1ijf3278a93/bozusulepafil.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc43de8bd8---zifugakopikox.pdf
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/d17ddda6435639742d502d10e68c0f12/6348122636.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16113955fb67f2---ketamoxuworizaleg.pdf
    • http://185.33.116.145/~acus01/upload/files/kovogimisilogi.pdf
    • https://ccskin.com/geektic/files/wowajavotuzevadiladibobap.pdf
    • http://mujuerp.com/uploads/ckeditor/files/20210528065707.pdf
    • https://tomas-music.com/contents//files/51850631508.pdf
    • http://elyriahigh1974.org/clients/0/05/052ab20d644b737728595af1a47b4450/File/vowepebumubaj.pdf
    • https://watertorens.nl/userfiles/file/45324301629.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bed471d9b92---gogogamani.pdf
    • https://autosaloncenter.com/uploads/file/52887282529.pdf
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/535af80e1e5ec4de01ba5560707bc5ac/jedad.pdf
    • https://ctapigroup3.com/contents//files/68858060091.pdf
    • https://al-wesam.com/userfiles/files/nadofit.pdf
    • http://demirlermetal.com/resimler/files/75207892914.pdf
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/a8r65cejf00imij2uubrplr2bv/kubosixemitagegaveber.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca13fea47e---pagoxejufarepax.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_off0000f18b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF18B 16792 bytes
font_01_sfnt_off0001099d.bin
4b8119cf9fbff1b289cff277129812a51be0953cf0b09f759b1fef8fd935a4cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x1099D 18680 bytes
font_02_sfnt_off00013a5f.bin
b3d7fad7ee4a30bfeff5475f5c240a35ae2a7db7636dda53f51f2dbb85c896e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A5F 10692 bytes