Malicious PDF — malware analysis report

Static analysis result for SHA-256 202e8ed88ed819a6…

MALICIOUS

PDF

76.8 KB Created: 2021-08-28 01:27:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e54d798005756326e999adf18555c187 SHA-1: 4b5029b0af9d7bc87b97b11ce0207650fbfaaa75 SHA-256: 202e8ed88ed819a6ba6d929f3735bf93bbb467a8855033770bfcf1bb22aaa8e4
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links, many pointing to compromised websites or disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish for information. The presence of external URIs and link farm heuristics indicates a strong intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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 http://tvtamminhphat.com/uploads/userfiles/file/nizujetatofivutatak.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/56956047665.pdf
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pazawobuluvisatodiwejedi.pdf
    • http://gyuco.com/uploadfile/files/20210818_012508.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d73b1d8c1---xazevaxexuwusigavamek.pdf
    • https://verandapattaya.com/userfiles/files/gununazigetelujowakovef.pdf
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609681e087d9d---84919110476.pdf
    • http://dynamic1984.com/user_file/file/29138807737.pdf
    • http://iseveranscopy.com/upload/editor/file/basazuvoxavosisiz.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1611ebeb66ede4---75520905672.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc23d6a4eb7---23978228691.pdf
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/d5a79038b298ddfcc60b39962ac53311/97487665842.pdf
    • http://ranjitabiswas.com/userfiles/files/51398942621.pdf
    • http://ty-universe.com/image/files/20210826_075854.pdf
    • http://tantusmarina.com/UserFiles/file/veminiwizodowabojetepov.pdf
    • http://koszyczarek.pl/userfiles/file/2192577268.pdf
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/psebkcpjhgt38n31q13nce816c/borawebujuzilu.pdf
    • https://ms2gacor.com/contents/files/37493460672.pdf
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/44fab97465c070f058d2d8dd55226f73/kitop.pdf
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/epjkmgudv4l0khpbd24rtgpvpc/73853677663.pdf
    • http://jamesirvinewedding.com/clients/f/f9/f947a18657f5d77a8fcd192ffd4ccf25/File/judawizawanositi.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160730427ac58f---70264998443.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/pmea2ms6nj8g7pu7lt6f57ha66/59148177317.pdf
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//norofifulaputupu.pdf
    • http://nctpa.biz/clients/5/51/51e593b678cc4707ea5ff7b662bcbdb9/File/34725228307.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f97a4ac7887---72230831981.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=scary+movie+2+watch+online
    • 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_off0000c7bc.bin
3d7ac5053fa3f1997c2aab13210a3e20e43d7b4c0bb580e6792f30f344cf80b0
pdf-font-stream PDF embedded font (sfnt) at offset 0xC7BC 17588 bytes
font_01_sfnt_off0000f4b7.bin
68dfb0fdc768d8e2d0cc53329f0c64e741aa44420c8d6aea0755868e31f797f0
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B7 10788 bytes
font_02_sfnt_off00010d87.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D87 16792 bytes