Malicious PDF — malware analysis report

Static analysis result for SHA-256 a358f0de1d35e6aa…

MALICIOUS

PDF

84.1 KB Created: 2021-08-25 19:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1f110ae24e7ebea148f5a8df126f001a SHA-1: 2faf54ca16be815e8f5f7c43d30c85097aec9c18 SHA-256: a358f0de1d35e6aa9c04e7e01ed8d77f3a3f446989cab2aba859e35207fc96e3
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs hosted on various domains, many of which appear to be compromised or disposable. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of multiple external URIs and the link farm structure suggest an attempt to redirect users to malicious content, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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://carrollcountylawyers.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/logoloramorovisukoli.pdf In PDF document text
    • http://adirondackseafood.com/ckfinder/userfiles/files/96157716271.pdfIn PDF document text
    • http://connectcontrol.net/files/userfiles/files/tadenuxoboradorakikikazu.pdfIn PDF document text
    • http://permanentnimakeup-brno.cz/userfiles/files/zomebamafutakowexew.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/c5f626653abae9f227580c3b2b004699/99375246504.pdfIn PDF document text
    • http://phuvuongcorp.com/luutru/files/63807164399.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/zojanokewemu.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b166b80b5d---15522462025.pdfIn PDF document text
    • https://nguoixunghekiev.vn/userfiles/file/femexubekidumaji.pdfIn PDF document text
    • http://studiodispirito.it/userfiles/file/24064882582.pdfIn PDF document text
    • http://chanakyaaerospacedefence.com/userfiles/file/88919841494.pdfIn PDF document text
    • http://auburn-companies.com/userfiles/files/bavujilakadatosulakevobef.pdfIn PDF document text
    • https://nikoljski.com/ckfinder/userfiles/files/moborevedavemobet.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160808c9045ef8---nawelomelopada.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608231afcd503---96211770102.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a41515343fa---kifipuvuli.pdfIn PDF document text
    • http://vhz.cz/user-files/vifuzemosotidirugoxepuwe.pdfIn PDF document text
    • https://lrsdev.com/userfiles/file/34493193687.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/xezijarezomobiwu.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16086e39e8c54f---61334844166.pdfIn PDF document text
    • http://paramountswimwear.com/userfiles/files/6423057683.pdfIn PDF document text
    • https://elitstroycraft.ru/source/file/53501572889.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/64554401371.pdfIn PDF document text
    • https://banghenails.com/upload/file/melunipikire.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/kp77qckd51p4e84v84qaq54thj/39233017314.pdfIn PDF document text
    • https://fokusmedia.com/images/uploads/9874978866.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=money+word+problems+with+solutions+and+answers+grade+5PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE263 16812 bytes
SHA-256: 90a69357fb89d914eeb59c20247187633e8b550c43036796ed263f84620c08c7
font_01_sfnt_off00010e12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12629 11408 bytes
SHA-256: be2be4b0957c10fad8fbe1efd1670eb90d858cc63225ddfd74f46ed5c1ad5e04

Open this report in the interactive analyzer, or submit your own file for analysis.