Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f970f1e647db0d…

MALICIOUS

PDF

89.7 KB Created: 2021-06-12 13:00:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f4626b4d56064b3286169790ce343b21 SHA-1: e10caa307ef16884d48391077840261d9924d50e SHA-256: c2f970f1e647db0d0e09e78ac20ff24787941f18f90341c6a52fe5891d75b278
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of external links, identified as a link farm. The primary URL, 'https://oniceh.ru/pbw?utm_term=dilation+activity+1+king+tut+answers', and numerous others hosted on disposable domains like 'weebly.com' and 'pbworks.com', suggest a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://oniceh.ru/pbw?utm_term=dilation+activity+1+king+tut+answers PDF link annotation
    • https://nosodawef.weebly.com/uploads/1/3/4/6/134693330/tepenomif.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4408004/normal_60b72c649dea2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375514/normal_5fc896a975aa7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388169/normal_60655cc59cf28.pdfIn PDF document text
    • https://gazolono.weebly.com/uploads/1/3/4/7/134721713/zojumuditusa_jinewovu_vavup_duxufebatego.pdfIn PDF document text
    • https://xonarupitowij.weebly.com/uploads/1/3/4/6/134617661/bisasejoru_wawudurame.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366637/normal_5fe449968f5fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411918/normal_606e3c35af0be.pdfIn PDF document text
    • https://lopekemin.weebly.com/uploads/1/3/4/6/134628767/silasiselesaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487399/normal_5ffb461465349.pdfIn PDF document text
    • https://rukepeninosiwul.weebly.com/uploads/1/3/1/4/131406291/8f85fd3fed15d.pdfIn PDF document text
    • https://rovividupezudu.weebly.com/uploads/1/3/4/3/134373795/6847972.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425209/normal_605105dcec1e9.pdfIn PDF document text
    • https://belawutuvuzepim.weebly.com/uploads/1/3/4/6/134605506/fimoxo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zovafidat.pbworks.com/w/file/fetch/145172667/45107688155.pdfIn PDF document text
    • http://nugewil.pbworks.com/w/file/fetch/144606903/xujilolitem.pdfIn PDF document text
    • http://rimikupababo.pbworks.com/f/45590730752.pdfIn PDF document text
    • http://xuzutoli.pbworks.com/w/file/fetch/145172043/waposegijuxapidadijetirat.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fda1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA1 3032 bytes
SHA-256: 25d16f16e695d910fad86cc1f8a028000560a24a301ee3b1784a2f0f392c7a10
font_01_sfnt_off00010864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10864 5336 bytes
SHA-256: 089e4558999f0460aa2e924214633b544f28047586581513f090f28f9f28ed93
font_02_sfnt_off00011aca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ACA 11572 bytes
SHA-256: ea9faf410835152cb8d5869413523567934ce9b87a3f2f6b8afc7586f9c67fb7
font_03_sfnt_off00014239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14239 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2