Malicious PDF — malware analysis report

Static analysis result for SHA-256 951b39c206339b56…

MALICIOUS

PDF

69.5 KB Created: 2021-09-13 18:32:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f776ec4d949efaa105ba9c650d98eb7d SHA-1: fb1d740e683039dbfbfb47b62449c5b9220cfde5 SHA-256: 951b39c206339b56039ce6d5760de62f9c114cfe6908d8ec8dd17c569e204be5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users to potentially harmful content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, identifying the document as a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://allytemp.ru/uplcv?utm_term=white+balance+color+temp+meter+apk PDF link annotation
    • http://sp2wronki.pl/fotki/fotki/file/34365232282.pdfIn PDF document text
    • http://pampa.be/uploads/userfiles/files/sujosifajunot.pdfIn PDF document text
    • http://fcgo.tw/uploadpic/files/pipinuwelab.pdfIn PDF document text
    • http://ooexperience.be/assets/Image/files/29273424492.pdfIn PDF document text
    • http://demo755.webbazaar.com/uploads/rexofejuf.pdfIn PDF document text
    • http://jcbcharpentebois.com/ressource/site-image/files/sobunatedipexanoruze.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/81177633335.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/6470100163.pdfIn PDF document text
    • http://chapelguild.com/images/usr/zakigezojonuvo.pdfIn PDF document text
    • http://anpo.vn/upload/files/sikanojagitotufexomajazi.pdfIn PDF document text
    • https://defi128.phpascal.com/userfiles/files/22868512717.pdfIn PDF document text
    • http://nocleginaplus.pl/uploads/userfiles/files/zabopitewewexilodavulos.pdfIn PDF document text
    • http://tianfonmm.com/d/files/lixukipuxo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b39c3f21c5---xejegawosekem.pdfIn PDF document text
    • http://htk2.altrodesign.eu/ckfinder/userfiles/files/40322309936.pdfIn PDF document text
    • http://benetalent.com/upload/files/mofoturemolomotogosuxupi.pdfIn PDF document text
    • http://encino.ilovepokebar.com/uploads/files/dutizoweworenebabesosiso.pdfIn PDF document text
    • https://oncallanatomist.org/ckfinder/userfiles/files/jevojevidibizufumi.pdfIn PDF document text
    • http://cerezolorente.com/files/cerezolorente/_repo/file/72670401572.pdfIn PDF document text
    • https://dennismaloney.ca/upload/editor/file/mojisub.pdfIn PDF document text
    • http://laros.cz/UserFiles/file/kilofavomaxa.pdfIn PDF document text
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/13574911273.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_off0000aca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACA7 16656 bytes
SHA-256: 96a2bff691cfd67d5fc5238f175fb95415b0bcb9a3e873ef852150440016f304
font_01_sfnt_off0000d67e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67E 10696 bytes
SHA-256: e71dab73ab1dbe02ce88c3bfda0acd1522ca028ce9c341e56fb14dfa17a9e195
font_02_sfnt_off0000ee9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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