Malicious PDF — malware analysis report

Static analysis result for SHA-256 070d16218d173b22…

MALICIOUS

PDF

111.0 KB Created: 2021-07-02 09:55:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6235a0e8a07e440978cca378a6fe034a SHA-1: 924e88113fa74527ac2eefdf6cdd89059130512b SHA-256: 070d16218d173b222252afd8dc3597549481f505d771f506073a4dd3fc3fb8ef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was identified as malicious by a machine learning classifier and ClamAV, detecting it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites, likely intended to lure users into downloading further malicious content or visiting phishing pages. The presence of embedded JavaScript, though not directly analyzed for specific actions, is consistent with PDF-based exploitation techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/jhfeq6ft2auqflsi25iul7vnhb/binapivijinetesijuke.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/35d55fadb962df2133b12f2071a1e69f/wodefitapetilebig.pdf
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/b6655baf3005c8a9c92dfb42bb94b977/5571047927.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703df1e979a---moredaf.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a573c70d290---ranuwafuvedimi.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/vmtchqf7bnd21fckflttir6vs1/moseradobejiruxagum.pdf
    • http://casier-a-bouteilles.fr/file/57814122261.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/b8b2c1465f9af726234dcdcc69585cfc/30835041493.pdf
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/857ace76d89c08df0fa303f528bad149/jufegitorarewe.pdf
    • http://kulturazebrak.cz/userfiles/kefomeketosaxumaz.pdf
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/99b5f6ca91b8c1aae560baf43e2fb1e0/56296261106.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16079c637d53d1---teresewasimorisolokijo.pdf
    • https://cafe-malaysia.com/contents/file/16053403689.pdf
    • http://bachova-terapia.sk/images/file/63078945610.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/fcc24914549dc545fd534e45cb1a4333/kaboxojuk.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/11c9a965af119179f3f4946b27f158a0/tipenedikamagukulobizax.pdf
    • http://primaneighbors.com/userimages/73796795606.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608d89ee309f1---14109737364.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b6d7bebc7bb---zotopivunog.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609871723623e---87723241838.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=the+kingfisher+fce+answers
    • 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_off0001489a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1489A 16792 bytes
font_01_sfnt_off000160b1.bin
c992c3413481a2aafba0610b7d689c866b610ab0c78fb006cf264beeeccf80f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x160B1 10492 bytes
font_02_sfnt_off0001788c.bin
12b55f1ade749f99002e56cefe3fbe8177682b52bf493c82820202abf41f7c7f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1788C 20724 bytes