Malicious PDF — malware analysis report

Static analysis result for SHA-256 be55178b0a67ad4d…

MALICIOUS

PDF

107.6 KB Created: 2021-06-28 23:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 969a5354bfeae4fb431336a10db96529 SHA-1: af8859d322d47411806df418addf3342f68ef76f SHA-256: be55178b0a67ad4d1b13fb0f0be964af46e69ed2cb4a8ea4c46eec19960e228c
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with numerous URLs pointing to compromised WordPress upload directories and disposable hosting. These links are likely intended to redirect users to phishing sites or download further malware, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9666

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://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba62c76f2c6---35282709693.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7fd3baf199---36525771408.pdf
    • https://aviseco.ro/userfiles/file/neligugexajuposevodavim.pdf
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/7475f6fba302ca47174c751dc638b7d2/24992647612.pdf
    • https://nhachoxebus.com/upload/fck/file/vomivip.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b72659d3c04---73770853191.pdf
    • http://fixafilm.se/userfiles/file/dozapapifitoxerisosi.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087519e442d4---30059358210.pdf
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/1bd90345a5cb5d418fc1500aca1df24d/nexanitatowene.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5b5c27b4d---bupuwifokim.pdf
    • http://chaodontuonglai.vn/uploads/ck_upload/files/2459067632.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608abbe3bdd11---11737491160.pdf
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/22f823a56208497cd5acfb2a02d3b791/sepupozupune.pdf
    • http://micronforgacsolo.hu/UserFiles/file/8378913577.pdf
    • https://gloriouz.in/ckfinder/userfiles/files/95363092854.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdfa1475db---51369731831.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16070502107db2---51421612853.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b282648034c---tarilutuxajegijox.pdf
    • https://jetaime-shop.com/files/19578665835.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607754d39a049---31340727130.pdf
    • https://betenrealestate.com/sites/default/files/file/pavuvuzupo.pdf
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071e84fbe541---40532919264.pdf
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/01cbffa04324a6698687ab2f0f4d7470/56260273406.pdf
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609407e90a735---volipezajizelabojunuwaf.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf08371547---43756025530.pdf
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af40d5ae690---56790489366.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=fast+%26+furious+9+full+movie+in+tamil+download
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b2e.bin
f51d5d1ed6f87b52d1b9f429dd51402bf3eddb0f0727a485d5a13d2cfa109c79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B2E 9476 bytes
font_01_sfnt_off00012f8d.bin
abc423e84d9ed075179c038eb9155baf062df0a8ac6be0923d9d21aa5a5fd5f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F8D 18408 bytes
font_02_sfnt_off00015ff6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15FF6 16792 bytes
font_03_sfnt_off00017804.bin
1f3ee04788960bd4cd199d2878ecf889dff489b4b727edda04b4d1fa0d3fd455		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17804 12396 bytes

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