Malicious PDF — malware analysis report

Static analysis result for SHA-256 86165ffd0143b429…

MALICIOUS

PDF

83.4 KB Created: 2021-09-03 18:54:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6ba155817a09264f8f8dfa5992c46ed4 SHA-1: 00f24ab100e0dcc7b9bf8db55011cad7b9bf6b73 SHA-256: 86165ffd0143b4299ea5f2746d9c35578275000c1f3ededad6172f22aa11b4e3
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites hosted on compromised CMS platforms, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, with the file being identified as a phishing trojan. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/d534s1te2d3redsk8m4pb57n62/jawed.pdf In PDF document text
    • http://fluitec.fr/ressource/site-image/files/kepixowavexidabuxatebe.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160c27d7032b6b---35005895776.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/d8e9e1237394c897b5f025d56a568a87/kawelesisenubejokoka.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6bf2dbd5b---42662310252.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/bawawajofasagixoronifuli.pdfIn PDF document text
    • http://atrsara.ir/resource/files/40248508677.pdfIn PDF document text
    • https://vicotelecom.vn/static/source/images/file/40699826300.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/67056918864.pdfIn PDF document text
    • http://huh.hu/UserFiles/File/fisatutaxalepikapobika.pdfIn PDF document text
    • http://ansatrans.ru/admin/ckfinder/userfiles/files/40399998269.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16080812718baa---wunasawikabobib.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/rogabewala.pdfIn PDF document text
    • http://primethailand.com/ckfinder/userfiles/files/66007720932.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/25343704329.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/5f2fd5583eddb2ae5f58d6326a7572fb/16559275746.pdfIn PDF document text
    • https://marblobaths.com/app/webroot/img/files/zinuluvijajivibi.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da327d7838e---54177191538.pdfIn PDF document text
    • http://studiofelician.com/userfiles/files/musenedamenutagovijako.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/65310df3af88ac304bce13c636e2bc3a/wegudefanigofowadezolaled.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/88855986196.pdfIn PDF document text
    • http://blackivy.pl/userfiles/file/41665234335.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/p3oked1j5te7cifkemvp5ebmqb/leruzemeniv.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/zefosimo.pdfIn PDF document text
    • http://papaicountrylodge-longstay.com/user_img/files/velal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=doterra+essential+oils+for+cats+pdfPDF 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_off0000e0c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D8 17972 bytes
SHA-256: f703bf0ca54c31af4bf03409635074f5d07fa4dd0fa83077a07055e8459f043b
font_02_sfnt_off0001273a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273A 10616 bytes
SHA-256: 5eb6784996aa8f02c4c3c266557980cc753901af721a365cb5c22ea70e880bcb