Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd17940728817669…

MALICIOUS

PDF

80.6 KB Created: 2021-06-25 17:41:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2f5ecf4d2ff0cfa4b38e2c044fb361e7 SHA-1: b2ccb828d31c1c82700ac87d311bcda6447458c2 SHA-256: dd17940728817669fc8d3239e6232dd71e224fc6415a9b1655ec46ee970894c7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable domains, suggesting a phishing or malware distribution lure. ClamAV detection and ML classification confirm its malicious nature. The presence of embedded URLs and the link farm structure indicate an attempt to redirect users to malicious content.

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://garglob.ru/uplcv?utm_term=the+seven+year+hitch+123movies
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/28062d207cd8166579a8424f11228393/bovonuviguwuxabepidi.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/9c4255eb535ce38098a212a2901f4c02/77057312295.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608574be3e0c1---40574744718.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/92763197575cb524c42dcfee8253d49e/bajebukupuliwokisij.pdf
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/52c093b53ad03450474849c68c28af1a/60880715567.pdf
    • http://myjobcareer.net/userfiles/file/2021060520493573499.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5026351e3---bujoditezazuf.pdf
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/74f77ca1be333d163b6203d15d2c8b83/zafixavafobamigixor.pdf
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/9mlkdjdn8h22dc0grkc9ql1om5/66594270873.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c9887a536a2---sojiz.pdf
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dea8db7c2d---79999019180.pdf
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/55bfb18a7ed10fc756fd7ddbd5988847/81943264230.pdf
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1d72e375f---tifarotumefojeb.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ab2689a543a---mitenusewiso.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8ca029cb7---tosatikopigosogesabe.pdf
    • http://labonguyenhoang.com/img-chamthi/files/xaxatanokojatetigogas.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1b2bd108c---jojanikiwekubogidelotu.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b578e6eccf7---46034190328.pdf
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/c58s8nvh9lpf5724harfe82f71/lemowafosoxizebom.pdf
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/f69e6528672ec2509a4a5574cfda56e1/6214874589.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bb3c3b84693---19395207182.pdf
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609287ad5499a---88351166526.pdf
    • http://zkojicin.cz/userfiles/file/zifovofowabatuweje.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_off0000d196.bin
2a6264b861324b8b76c04625c7abfd908d6cd11041b5a57070110d41a1d95c78		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD196 20008 bytes
font_01_sfnt_off000103e2.bin
5d241c070d10a4d6b081fd947e535e6f393ac44f56d022b1d373033e7da4a2d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103E2 10936 bytes
font_02_sfnt_off00011d44.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D44 16792 bytes

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