Malicious PDF — malware analysis report

Static analysis result for SHA-256 a74ad7d0eda4e3a9…

MALICIOUS

PDF

86.6 KB Created: 2021-07-13 10:25:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a33bdbf7ae9516416e6819aa035a52fd SHA-1: fbc329aaaa4e2339e95de569f72095135ed4e4d3 SHA-256: a74ad7d0eda4e3a958a0976cb4c2a309c72e8237fc577616b61b732115675041
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to multiple compromised WordPress sites, a common tactic for distributing phishing content or malware. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the structure and URL patterns suggest it's designed to redirect users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16070a0ced7dcb---43803270019.pdf
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/bexuxeke.pdf
    • http://nowyhotelik.pl/userfiles/file/nilerapos.pdf
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/e704ff0b3864f5406c0df18c748b7c87/59819514179.pdf
    • https://ktmcollege.org/public_html/userfiles/file/mujalekekino.pdf
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/8da8eohkgl0pm2on1nc1r7jmiv/rorobabezugar.pdf
    • http://stark-tools.ru/images/uploaded/30386316116.pdf
    • http://bhk-aindling.de/userfiles/files/45180385483.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/6a9f6b3afe99ecb049232a81e210b267/potekobirorujaxedodexibet.pdf
    • https://mytekas.com/UserFiles/file/lisabidufonubemetato.pdf
    • http://carzip.biz/files/uploads/files/zugoduzadomebiwor.pdf
    • http://hit-air.pro/ckfinder/userfiles/files/ruvuwasovafimu.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0e8b626e7---bometoxazubu.pdf
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/2e037176f4b4e7195cf94f29af6842d7/51177773407.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9fdb4ad1d8---65295883024.pdf
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a38d7b5282e---86330712856.pdf
    • http://mdbim.pl/ubezpiecz/obrazy/file/49222825722.pdf
    • http://szao-spb.ru/images/news/file/dumew.pdf
    • http://woodsfamilypride.org/clients/2/2c/2c83419adcf4927d74d3defe18342386/File/54328627438.pdf
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/0b6c7adb9b3bed6525c03aa3c616864a/poligexitazezado.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/38d33dd374707cc5b9711673a387dd69/58737776823.pdf
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7a9d763c5---13197651985.pdf
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/4bf7b5f2d08e2b1b0029bdb4be4c2050/68718533126.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160718c9a95dd0---11836743824.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9216dd0d0---dovajavepowaf.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=us+medical+term+suffix
    • https://mediaget.com/userfiles/files/kokobumujulazenafovadas.pdf
    • 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_off0000ebba.bin
204896fc0b8737c0a2fa6f44eacc425c3dacc413cfbe14903fa9d2aee5438374
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBA 19212 bytes
font_01_sfnt_off00011ce8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE8 16792 bytes
font_02_sfnt_off000134ff.bin
b92b0dc458fb2ebced3293184d77de8b35309cb7203aaccfbb577759f53292aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x134FF 10624 bytes