Malicious PDF — malware analysis report

Static analysis result for SHA-256 217bb874ed6c16c7…

MALICIOUS

PDF

87.1 KB Created: 2021-06-30 23:22:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 70735d55f110f2df3fe1be719c2c4002 SHA-1: 5f038b7d078e6e08d6987b8cbfa271f91284b60e SHA-256: 217bb874ed6c16c79950b7d978e4950cc1fcd3cf05011e0b026c0dc1848ec0ec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress upload storage and disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c84f7d2c83---bejedatafiladobimak.pdf
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/pr602roj2aptck8dis1k07clm1/37913265270.pdf
    • https://aokman-drive.com/d/files/rojorokotamipojivupa.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160734e43b1199---99715690556.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c46ebb119---77325225910.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba66b6b02da---96343136603.pdf
    • https://parfumzone.ro/files/file/walipizo.pdf
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c308ad9613a---votutudaseroduwona.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c5bd191e631---zupifasaxigezodepilofu.pdf
    • http://roughriders66.com/clients/f/fa/fa96273273f04fd2a06feef12b1e4d70/File/gegibetigifonosev.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/153a61531f9c1f561d41dc5eec5b5f4f/56236905074.pdf
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfa1c93232---botiborusipefazovelodosaw.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160774d3c89908---80195323876.pdf
    • https://betenagro.com/sites/default/files/file/jiloxawato.pdf
    • https://banghenails.com/upload/file/67997809435.pdf
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/97258640183.pdf
    • http://mrpokedb.com/uploads/files/32769409035.pdf
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16092554649427---42022294210.pdf
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1b2ab4af0---zopapatolidesoxuj.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce32962c826---rozowumezudupuweguw.pdf
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/2j05bl3vbh08tge6cpv2tbo55c/besolu.pdf
    • http://amadpich.com/userfiles/file/finufoloxalub.pdf
    • https://balajitutorial.com/admin/userfiles/file/66535174929.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=milk+yield+meaning
    • 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_off0000f18d.bin
7c1ae68d55eeb0aa5e702ad443095bd82676f30337bc12932b12abc174d8091e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF18D 18924 bytes
font_01_sfnt_off00012075.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12075 16792 bytes
font_02_sfnt_off0001388c.bin
640ba8d70101e34f919bab956188d00ea7a1750019da3991780823ae22924ba0
pdf-font-stream PDF embedded font (sfnt) at offset 0x1388C 10304 bytes