Malicious PDF — malware analysis report

Static analysis result for SHA-256 744809b676620f88…

MALICIOUS

PDF

96.9 KB Created: 2021-07-05 02:58:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 55383b2aa217a648239c4ea2bba93248 SHA-1: 01ba94320d11f5034d13aea610457d129c447f09 SHA-256: 744809b676620f885a3911dada39ab30103a193e6342b01000bbddad6522bd04
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL analysis point to a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9811

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://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/2dlgorbnkqu3kkb24550lr2bnc/kugemumaj.pdf
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/a23a1b3d4d99757f2cff6988cbe4275a/58447197363.pdf
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/36e48aa4f736fc0273ba703b19edc6bc/mudetakevaruwakewu.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecad9e549b---nodivepikifagibisilew.pdf
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e97e81338a---98289586019.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d39431ed3dc---tasokikabuxo.pdf
    • https://binarbaidfabrication.com/public_html/userfiles/file/12705454115.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607341d1b2a78---lopenujefirifupomevajad.pdf
    • http://anhuizhkj.com/upload_fck/file/2021-4-30/20210430175813988896.pdf
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/a019d49cd9d410a4e18bb5e7055307e1/lelirodasefunekudowabazu.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/f602147476ae15d6be5fd317b7a190ef/vozivoketifo.pdf
    • http://pension-erlkoenig.de/img/editor/file/14356418440.pdf
    • https://www.passion-rnd.com/upfile/files/2021/06/27/kokelol.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5e6888673---4091478199.pdf
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/0ij62f19dsuastdr00ef0u66s2/41997295387.pdf
    • http://ntrc.biz/clients/f/f0/f0759d16aca5b3dfc9163ee994587b7f/File/batetekalesixiloti.pdf
    • https://acgroupenterprise.com/userfiles/file/gozamukewaxese.pdf
    • https://mm-podium.ro/userfiles/file/rageziwonemukujafafomadep.pdf
    • http://sattosushi.com/uploads/files/40383729851.pdf
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16090641dc3423---nipeneven.pdf
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/9dbb7c79b1a13f31a36cef8741657284/famawewesaxaxexunerisugi.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/f30e5813cca30287de975edcb01d2d1a/15261292078.pdf
    • https://store-connector.com/_upload_bilder/_filemanager/file/netodepisazifi.pdf
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/b09f11622fa28965d0082766d29516ea/nudajemavakunulitijemez.pdf
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/lesmadqtcs5um90isou3sgnro1/wukiruridoriraxad.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=tittle+tattle+meaning
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00011c41.bin
d0601248f524b782632b00b6e543a1266d8ae223408667b79d99314f909cfd82		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11C41 18596 bytes
font_00_sfnt_off0000da48.bin
5f3e6772bf7af7fcf66352741424c48a0c16fd7f7006a6bf3dff93b5c502a733		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA48 5504 bytes
font_01_sfnt_off0000ee02.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE02 16792 bytes
font_02_sfnt_off00010619.bin
d041735147f918265980dca6db55b8f302e0ad84584faaecd64311ea847d714b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10619 10024 bytes
font_04_sfnt_off00013aad.bin
785a1bd297acf1c7e5dffbee2b3070a6952c597ee29cb6f3c411a377e36ef6ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13AAD 24240 bytes

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