Malicious PDF — malware analysis report

Static analysis result for SHA-256 b36a7a25b254a422…

MALICIOUS

PDF

97.6 KB Created: 2021-07-10 06:20:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 12acfb02b68a0cf222e0ac2eaa37f808 SHA-1: f6a41738bddd53cef3a577be42eb843db8668f83 SHA-256: b36a7a25b254a42297c0de117a1e4b55b737140086e7412741cd655ea368041f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics indicate that the primary function is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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 https://crewmak.ru/uplcv?utm_term=product+of+complete+combustion PDF link annotation
    • http://alibabashipping.com/userfiles/file/zaxamuxeraxavumoku.pdfIn PDF document text
    • https://jiu-hang.com/upfiles/editor/files/24072172427.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740ccd7a65a---13538280825.pdfIn PDF document text
    • http://carriewoodfamily.com/clients/5/5b/5b9f2fb360c4065436fb7fe1267c3612/File/dalaxatelizumemomeba.pdfIn PDF document text
    • http://edanieltour.com/FileData/ckfinder/files/20210613_3F2AF7921911834E.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/c8fe1e1157e31ca08c6ee199a83e1be6/mesuzasinabatonawar.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f0edaafb30---37054633813.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a046a012b23---wabotujapovaja.pdfIn PDF document text
    • http://hyosangjo.com/userfiles/file/20210620115652.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/serifugeruxe.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bba12122dee---vabom.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607211c14e728---80949549869.pdfIn PDF document text
    • http://fobosgrunt.ru/files/ckfinder/files/79126217760.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/848c0b27d76bb64029581089b02f7b64/mepupazudexisixo.pdfIn PDF document text
    • http://ptaki.info/imgekoprojekty/files/88190483788.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16098890c7cc07---xaxuzamotifiwakoxep.pdfIn PDF document text
    • https://parfumzone.ro/files/file/54063210710.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/14014027046.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0637abbf4---45951908358.pdfIn PDF document text
    • http://mlsy.cz/images/file/files/degesipazojogaguv.pdfIn PDF document text
    • http://tuanlongland.com/upload/files/79655001894.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/73vofka65l7dc9431ep5p22taa/38111646117.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011a11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13223 17556 bytes
SHA-256: ffddb2ea8343ff05fc9340c0435c256ec77287435ff7a61cdd18547a27a98cb6
font_02_sfnt_off0001605e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1605E 10860 bytes
SHA-256: 07a9162094cf01ee272365081bd0fbd7479a1d283d720cce67272f40794d85e2

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