Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c4cd49b35e61f99…

MALICIOUS

PDF

90.1 KB Created: 2021-04-26 13:26:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 65993da1b49c2e73cd05320a6f0e8332 SHA-1: 09802a60582b714ef9b14f7c0c5b079355e548d3 SHA-256: 2c4cd49b35e61f9925ae098e007359b25e00f6304687c5413a8a3dfa0ecc4b4f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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://soxebez.ru/strik?utm_term=is+there+a+us+navy+base+in+texas PDF link annotation
    • https://cdn.sqhk.co/rolidofajug/juZA2hd/radorud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367311/normal_6034e08d0ff0b.pdfIn PDF document text
    • http://vowitufafuzebil.scienceontheweb.net/48129137633.pdfIn PDF document text
    • https://cdn.sqhk.co/waxubisolo/RgSghP7/king_s_raid_successors_of_the_will_review.pdfIn PDF document text
    • https://vafobuzegigotot.weebly.com/uploads/1/3/0/7/130775214/7611741.pdfIn PDF document text
    • http://joritirumag.mypressonline.com/barejululipogujur.pdfIn PDF document text
    • https://nunajamedagafep.weebly.com/uploads/1/3/5/3/135325778/4929c33.pdfIn PDF document text
    • https://nugenezeni.weebly.com/uploads/1/3/4/6/134632238/57c23.pdfIn PDF document text
    • http://zexejodubaxiku.mygamesonline.org/wojikixapiw.pdfIn PDF document text
    • https://cdn.sqhk.co/duponetix/hjfsgcs/xexovojuk.pdfIn PDF document text
    • https://kofovozeregom.weebly.com/uploads/1/3/4/3/134313602/c22593af.pdfIn PDF document text
    • http://bekokax.getenjoyment.net/inverse_of_3x3_matrix.pdfIn PDF document text
    • http://excschool.ru/19563506311vaq8q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416671/normal_5fff695c9a48b.pdfIn PDF document text
    • https://rosanibo.weebly.com/uploads/1/3/4/8/134873488/vabinureruk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368996/normal_5ff1480be4d09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418175/normal_600315eca31cb.pdfIn PDF document text
    • http://gmetry.online/fisher_price_newborn_to_toddler_rocker_reviews5odjn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wotidupodugi.myartsonline.com/charter_spectrum_tv_remote_programming.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/kirby_epic_yarn_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/lettera_per_chiedere_informazioni_in_inglese.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/hip_abductor_stretches.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_off00012051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12051 5048 bytes
SHA-256: 09504bdef7871838de8f1fd65b97d264bcd7f270b96e9e6f1c466f5b0c872c61
font_01_sfnt_off00013182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13182 12164 bytes
SHA-256: 6f6c368ae5a68cc957c587dad26c473433b664c615bb59bd1008055ee5c21a89

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