Malicious PDF — malware analysis report

Static analysis result for SHA-256 c78f95244c139884…

MALICIOUS

PDF

91.8 KB Created: 2021-06-29 01:56:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 26a190532bc014b0b3eb6487e26cb7c0 SHA-1: 00dded6a8a9d16e36e301854041130fb25012490 SHA-256: c78f95244c139884a0f9e0371ed545dc09e28b9973c4daa2d46d141cbfbeafe4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other hosting, likely intended to redirect users to malicious content. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/4bc23a7a48aa6fcfb057af3e55ea774a/lusebupozuvanapibipa.pdf
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608534e367d69---bepotoweperit.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7fae35a369---46353692050.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607affdc85cd7---golul.pdf
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/a5a4ad162cf5ff136d7e5fe605eea7b6/lufitonorepawidiz.pdf
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/73d404e40d17eed76b5ac929e7b6f94e/jafemevimerefodemi.pdf
    • http://veterinariomauracotti.it/userfiles/files/28078997542.pdf
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/frt5ad5i9ga57hifl831p8scq3/19689685224.pdf
    • https://puppometalli.eu/file/tafamixen.pdf
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a1b582609---wekipisanifalabizebumew.pdf
    • https://aimara-bg.com/userfiles/file/merubiginofeleveleg.pdf
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/4k7ilmko3bgpc29k8d898lavb3/47820842614.pdf
    • http://synthecinter.com/userfiles/files/fasamisikufave.pdf
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/0c7a5212c241e9bd60cd87bc3d4106c0/44482520440.pdf
    • https://ottenburger.com/userfiles/file/91228807271.pdf
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6508aa7d3a---fufege.pdf
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/0f183a813d1db95348dcb3ac88acf24e/5495341716.pdf
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609869bb7d249---26715186518.pdf
    • http://bruningfoundation.com/clients/9/99/99acc79c432c4c389b364f5b25189af3/File/rapafig.pdf
    • https://chiuman-hk.com/images/file/63977281561.pdf
    • http://hotelgiottotorino.com/userfiles/files/zexexudafulejifijola.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/rs1m3fm0qvmhkl1poremi4ip1g/42851812515.pdf
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/dadab14e6f87e671a256db83d9374843/gimeji.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/fd7db10eb1483c20e0fc6246c49279d3/19395054722.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a649ea01dac---36910380242.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=hdl+and+non+hdl+cholesterol
    • 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_off0001041a.bin
44ca5a44ea70863cf10911dba271061f909d73845334a33c930ddf66ac718470		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1041A 17108 bytes
font_01_sfnt_off000130c2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130C2 16792 bytes
font_02_sfnt_off000148d9.bin
2356145a1ed9e687781ce6d55a7b39e2e3a08c0e17aee77a65bd0dfeea354a04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x148D9 10368 bytes

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