Malicious PDF — malware analysis report

Static analysis result for SHA-256 abb726efc1200acc…

MALICIOUS

PDF

78.4 KB Created: 2021-09-18 19:46:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6c10a67e39b3bb502511001ce3d875c5 SHA-1: f3f886dafb84edd9777f9bba3188b9ba20343d2b SHA-256: abb726efc1200acc02ad2c3d31d8abbf23483acd2f22be17a4e845ce06a6830a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 http://wingmanplanningdemo.com/userfiles/files/70835381169.pdf In PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/vipelupazozo.pdfIn PDF document text
    • http://bankerz.in/qpic/files/ganakadimow.pdfIn PDF document text
    • https://npkfertilizerproduction.com/d/files/64400627602.pdfIn PDF document text
    • http://galantemontagnana.it/ckfinder/userfiles/files/fulasekefodig.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/bf766e9317fd387fb47de0e25de98450/41426387483.pdfIn PDF document text
    • https://theshamrockpublecco.it/file/58239249624.pdfIn PDF document text
    • https://garnet-medical.com/userfiles/files/41089363011.pdfIn PDF document text
    • https://wintechindia.in/ckfinder/userfiles/files/1910829962.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/60669901472.pdfIn PDF document text
    • https://mobiligennari.com/userfiles/file/nonusitobilitama.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613b7f4d6e4f7---jewosidug.pdfIn PDF document text
    • http://innersolutions-uk.com/file/zufozo.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16137596b3671a---vamewusubozigilejafoteg.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/161337ec28edd8---xozuxuzuwusugajaxumageki.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/lotekezunuvilikotowili.pdfIn PDF document text
    • https://saleskerala.com/ckfinder/userfiles/files/50950111654.pdfIn PDF document text
    • http://tycoonmedical.com/userfiles/file/8444417662.pdfIn PDF document text
    • https://oncetrabzon.com/resimler/files/20932789411.pdfIn PDF document text
    • http://abbwingslynnhaven.com/uploads/files/gukufa.pdfIn PDF document text
    • https://taxfirma.com/userfiles/file/53605021242.pdfIn PDF document text
    • https://btsis.com/upload/ckfinder/files/sufajag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=khmer+smart+keyboard+apkPDF 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_off0000cd3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD3D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e54f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54F 17768 bytes
SHA-256: 8d994bcc5404fd2f88768310e39889d85727894e2a3e4b2859a0f58f91416648
font_02_sfnt_off000113cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113CC 10752 bytes
SHA-256: 25d760d66d0f4fc7d37eb80e1515281b232091935fc094d21ae49df4381de39b