Malicious PDF — malware analysis report

Static analysis result for SHA-256 7292d9c7becec5bc…

MALICIOUS

PDF

241.7 KB Created: 2021-06-28 12:43:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4c0f20809a0bd419ee8cc037d8d21086 SHA-1: 81c5e904b02b26dd0f5e83b8debf34021d668750 SHA-256: 7292d9c7becec5bc9d51365c74d11c27c21fa739aea38e137476e0da1f1c71b4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, with multiple heuristics indicating the presence of external links and a link farm pointing to compromised WordPress uploads. The embedded URLs suggest a phishing or malware distribution attempt, likely initiated via a spearphishing attachment. No scripts were extracted, but the PDF structure and URL patterns are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9873

Heuristics 5

  • 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.
  • 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://cructi.ru/uplcv?utm_term=acquires+meaning+in+tamil
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/ukrejrfso07805l3d0omkj9v4g/fiwupukiwi.pdf
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/b7aa4377b9284a8f924f8ee104b02360/kupufekuxadufugavoga.pdf
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/4fb0ba58753ccfa8be70c577aeb323a0/wiroz.pdf
    • https://aviseco.ro/userfiles/file/96960718411.pdf
    • https://colakcivi.com/userfiles/file/99611540738.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc6940e30d---71093171874.pdf
    • https://ceccarbotosani.ro/userfiles/file/vavilanivateso.pdf
    • http://aivieksteslaivas.lv/userfiles/file/26271769363.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074ba34a8036---wilunab.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088a1bea682c---26360050779.pdf
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/8aaff1cb1557a31e2f27ebbcef3d236d/lojujepeze.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c4734d18700---90305183953.pdf
    • https://apsco.ly/userfiles/files/zovutu.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c08f2b81ca1---93629284000.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/g3btgdh0tlctuugmfplqu5dc51/67846146567.pdf
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/9fda6f7e2ae40739463133dbdd00175a/fodugowogem.pdf
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1eea85d3e2---86821254911.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/023hbgmgqnc338k1area44j536/lirabulusaluginotemabuwo.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/rm96d9sa7m13g9cg0guolr6hu8/rujonusabarakirabolo.pdf
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/40808783763.pdf
    • http://lab4050.com/upload/editor/file/74980901589.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606e2b8076d9c---baxobinatakebofetab.pdf
    • https://mobiligennari.com/userfiles/file/sipetufubobapaxi.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_off00035d1f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x35D1F 16792 bytes
font_01_sfnt_off00037531.bin
7f9e56256b2b4e7bf737ad9ddd33c2113f2ee74695b1dc6a5025c0baa8cd0047		 pdf-font-stream PDF embedded font (sfnt) at offset 0x37531 16464 bytes
font_02_sfnt_off0003a015.bin
81e3f3b609ba2b141e7a013a0db1b61480e1fcb97e86035609815abea0764b5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3A015 10680 bytes

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