Malicious PDF — malware analysis report

Static analysis result for SHA-256 a922262da776da76…

MALICIOUS

PDF

94.3 KB Created: 2021-07-03 09:27:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5ce4e45a8a4bd479ced6ae59717106d7 SHA-1: a783cc7ee30f44c31e275a608ba6123dbc66ed7a SHA-256: a922262da776da76b54d5d4af0cf4f41015ab58eddf810263f1403037650f23c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites, which likely serve as a link farm to redirect users to malicious content. The presence of these links and the compromised hosting suggests a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a3326fe81bcccc3658d0595231455716/8229422321.pdf
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/gn0vqbq0d8vidd7da5st538ot5/wumebirurekirekitagatot.pdf
    • https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca19fa6ea5---sasuzezumoxotinaxamo.pdf
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/3fcf76a70f6b1096d862d9bf6c27f518/wabape.pdf
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/b0lb8kb532g520gb6a7a0l9nqa/19837361206.pdf
    • http://opusincertum.it/userfiles/files/rowos.pdf
    • http://konditsionery-reutov.ru/upload_picture/file/fubeburuvowumadeguxegez.pdf
    • https://bojovicsirogojno.com//files/71816293245.pdf
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cde72553cb6---vaxulikagakaweloximu.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d04a3dc49be---39938753724.pdf
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/416f470aa9d42479eddae9e9a95d264c/xowikawurotid.pdf
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/253c1389bed928d93861e73a16452435/midolopopobezubolu.pdf
    • http://amandamaitland.com/images/file/suriwawu.pdf
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/131bcf3a4dba654cbd28fda45083bf75/makesore.pdf
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/85603198253.pdf
    • https://divinenine.net/userfiles/file/tofem.pdf
    • https://ludifrance.fr/userfiles/file/40000170013.pdf
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/1d2c3fe5530d8c7d313f2a426d2ff711/mogadixudola.pdf
    • https://davidfauquemberg.com/home/fauquemb/david/bbdg_site/userfiles/file/xubovuvemivezituvodo.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ddf20c7a549244d4ecc572611a3c55f2/benadasetulumomep.pdf
    • http://adaviestransportltd.com/userfiles/file/waborukaz.pdf
    • http://renknh.com/ckupload/files/bufokoxikexisolojuv.pdf
    • http://www.trafikyaren.com/wp-content/plugins/super-forms/uploads/php/files/20cfcng2mcl7293gu96s4tu536/31573963417.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dab42534799---90895306994.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/lgcvtd8h5oqupn21095795j263/73472991017.pdf
    • http://china-miyaco.com/img/file/20215278340.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=yellow+faced+parrot
    • 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_off0000f50b.bin
4c0ac7e58b5839f897ea5b6568d03f1d29854b16ab1e1d0f5cf5433f9b2850c2
pdf-font-stream PDF embedded font (sfnt) at offset 0xF50B 10320 bytes
font_01_sfnt_off00010c7d.bin
0dc8fb8de20ce90c3127a7441dbabf503f206d008c73b4289ba12ca59e910331
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7D 21268 bytes
font_02_sfnt_off000140d1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x140D1 16792 bytes
font_03_sfnt_off000158de.bin
b8caacdc6ff1a8dace48650b0736a81da25c500c15fe3434e9ae4ace9027a3ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x158DE 5208 bytes