Malicious PDF — malware analysis report

Static analysis result for SHA-256 445b729c5d03911e…

MALICIOUS

PDF

91.3 KB Created: 2021-06-27 15:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e8da2c060a3efc4ceabea28fb36a3b81 SHA-1: e808f62fe489a2191de9fcd7e432ba63dfb3656c SHA-256: 445b729c5d03911e7bc44887882c50345367d8242f3df0530d70069e614c6758
196 Risk Score

Malware Insights

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

The PDF was identified as malicious by ClamAV and an ML classifier, and heuristics indicate it is an advance-fee scam lure. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The document body was unreadable, but the presence of numerous links to PDFs hosted on compromised CMS uploads strongly suggests a malicious intent to trick users into downloading further malware or engaging in fraudulent activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b39a18623---90469913247.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/thtv5ermhe91kqm5mnlb473157/96292739353.pdf
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/1figv2c8vefujverod2plic1b5/jorekesateraxe.pdf
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/4u2on4904uli2cmtf161226qo6/91742844540.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/cq0oke1vo2pvi2mb88h4svscba/28109539454.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/ht7jtbc7smcoi21ioegnaig4e7/26820071756.pdf
    • http://careerdynamic.com/clients/3/3d/3d9dba0a3645e5854abf1db7654b9c86/File/wexazu.pdf
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/97d17b9d562e931a7b0ac1c97d11a180/disefuzesetaje.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f9a002ee023fde4177023536e3fb2ebf/kedogewoxabov.pdf
    • http://augustaelectricalwork.com/editorData/file/68909527383.pdf
    • http://www.masozilina.sk/ckfinder/userfiles/files/bezusatepik.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/bed7ebfe0988087a84265df72451c29d/wurogufebumesa.pdf
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/04b5955596dfbde7429e551d0aa8bc7a/kumigalijopopowebelepusoj.pdf
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/b27934ce3bc56f776ba3d0ea90c3ae8d/rozibivowa.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3ac88fc12---kuzifabudumaziralafoj.pdf
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/f8db8df2240105aa88ff1d02903cbfc1/kovunoduze.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2dc4b3a1e---vagapafikareterebe.pdf
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab7311f223---69218134939.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/p94920kepbjv6cuaghfstfm5b4/1280045542.pdf
    • https://festival.bg/fckeditorfiles/file/gibafuzabesigud.pdf
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/1d9e698a16b72ac9fd9753ea73b04a85/49871876788.pdf
    • http://gilbertthomasreunion.com/clients/5/5f/5f56fe696be94dde62972871c8a9bc28/File/89715644981.pdf
    • https://mytekas.com/UserFiles/file/19807963354.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=michigan+state+university+of+osteopathic+medicine
    • 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_off0000ff04.bin
1457528942469be107346fdb89939182ce88305cff1af267127e46ed65d2a4aa
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF04 11292 bytes
font_01_sfnt_off0001193b.bin
f3557ee369ba7ba423245fa9aae62536875dc4fa83e9310c5b65582d10ea1469
pdf-font-stream PDF embedded font (sfnt) at offset 0x1193B 17060 bytes
font_02_sfnt_off000145f6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x145F6 16792 bytes