Malicious PDF — malware analysis report

Static analysis result for SHA-256 90fa289f72243136…

MALICIOUS

PDF

94.4 KB Created: 2021-04-25 10:33:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b51dac7804654df9edbe51b2d6a93ee1 SHA-1: 9d5692340763fa4287c1be8514a65451e91194ec SHA-256: 90fa289f722431362a18c72081a2114ff7766e79e23f50dbae71c591851e409d
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/strik?utm_term=zeny+cut+50+plasma+cutter+parts PDF link annotation
    • https://pamaridefudeluz.weebly.com/uploads/1/3/0/7/130776324/tuweguvowapuju-zemofuradifulip.pdfIn PDF document text
    • https://dakikizubebara.weebly.com/uploads/1/3/4/8/134889455/7199279.pdfIn PDF document text
    • https://kofijowuz.weebly.com/uploads/1/3/4/4/134446653/xurufo_desoxupizi_dofelamubolas.pdfIn PDF document text
    • https://vozoduxi.weebly.com/uploads/1/3/2/8/132815828/5414132.pdfIn PDF document text
    • http://japijemerojin.22web.org/zuxipixukixugamofeta.pdfIn PDF document text
    • https://zimegusak.weebly.com/uploads/1/3/4/6/134605775/f3710f18e.pdfIn PDF document text
    • https://bufenosesan.weebly.com/uploads/1/3/5/3/135329861/duvujazeva.pdfIn PDF document text
    • https://vademakab.weebly.com/uploads/1/3/1/3/131380849/1048229.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/sitiralowega.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/tevakajetim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49e6e7d6-75ff-4ff0-a650-2c21215a15c1/the_death_cure_movie_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8f28fd6-ede1-4617-a38e-984199cbd3da/31841094046.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8383c0dd-e743-465f-983e-5c8dc211dbe0/stanley_fatmax_powerit_1000a_air_compressor_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48f16a7a-2156-448d-b3a0-8e45b6f44226/geravefofakijuxa.pdfIn PDF document text
    • http://domemop.epizy.com/introduction_to_agribusiness_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7291647-58b4-4ed2-8dcd-d142e755015e/how_to_reset_linksys_extender_re4100w.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/nijopiluredebe.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/software_implementation_plan_template_excel.pdfIn PDF document text
    • http://bitokirapaxeg.rf.gd/zituselokigidewokedur.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/halloweentown_full_movie_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7640ba01-d885-4be2-b3e7-acaaca152ca4/kovuruzexanuj.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13188 5404 bytes
SHA-256: 9d3e54aab834687ef8def4823258bc760eafcdc327de5e5d3250ed0bab66fb21
font_01_sfnt_off000143e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143E4 11932 bytes
SHA-256: a2932ef127e777398b2c9422986240a1ef79514d8fc7b984d02562a084dd0ae5

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