Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfa60f660e375aa3…

MALICIOUS

PDF

100.0 KB Created: 2021-07-27 15:55:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3d6583f4b90ce35f3f9df3fe4c261ff1 SHA-1: 15df01633707ee27dffd5ca60d82648c83de70e7 SHA-256: bfa60f660e375aa3e344dfb5a73ce3683d62cb69ea7b74472c94b3079cf63715
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, and the document body was unreadable, but the URL patterns and heuristic firings are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

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://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec85bc1967---sofenoxuj.pdf In PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f46ad9767f---980291967.pdfIn PDF document text
    • http://sushrutproctology.org/ckfinder/userfiles/files/42177610078.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/bfab3e99e42132249907113559e04add/99298514422.pdfIn PDF document text
    • http://akcompany.vn/uploads/userfiles/file/83088890660.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/abc278ba464dcf9d698f8b3e4f1e4766/1763237538.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/743e19fc148207d887d4d163882b5c3c/xewanerevuzi.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9be67f357---jures.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c302062af4d---darixozuvut.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/208b900aca3ffd47b06b406672445f64/91126044149.pdfIn PDF document text
    • http://mentaplywood.com/images_upload/files/55130555940.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/344acdbf4303272c7c3d3c7f387ff301/98334416716.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/3anvadhs9tki5b4ha5do4fr3h0/subakisibavo.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf78064e14---21641736317.pdfIn PDF document text
    • https://ikima.fr/uploads/file/jonitukutexawenifipoz.pdfIn PDF document text
    • https://ipssecurityconsultants.com/ckfinder/userfiles/files/33794857793.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/koxopamijelumuwigedarafu.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b66758ab8---60878069531.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/jjavkt7gb7g62orbrsjn5au804/66625245561.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/4fdf67df643155509f04c92e993fb087/lirem.pdfIn PDF document text
    • http://skyfestival.kr/ckfinder/userfiles/files/94008371430.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16086fd8b6addc---famisudoninebibajab.pdfIn PDF document text
    • http://ombs.ru/uploads/files/farirokimorakedexu.pdfIn PDF document text
    • http://gshosnab.ru/userfiles/file/19383206892.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1b050b4e6---muxulev.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16091685cc8f6c---gepokidogiboka.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/c756c9009405e06c9c1177ddf9fba1c2/moratoboj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=tips+para+aprender+a+dibujar+caras+realistasPDF 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_off000122a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013abb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ABB 10720 bytes
SHA-256: b228f7f4faead3262cd652572292e9e4b5e3cf29585df94c2e0b62f96786bf6e
font_02_sfnt_off00015332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15332 17412 bytes
SHA-256: 5e73f439bdda33266ff69ba7859836c97f951320dd9bf5a13b43eb559eda7e34

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