Malicious PDF — malware analysis report

Static analysis result for SHA-256 df85c9ed55075802…

MALICIOUS

PDF

97.5 KB Created: 2021-05-30 21:56:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8a5086c0538dc1388ea8f5c5d2893f3c SHA-1: 103ab4e90e223c63cb5c796136b785dc16c3d392 SHA-256: df85c9ed55075802172541ce378ceb71de0f2b9d3beb5db66b923386ea9fe80e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier, indicating it is likely a phishing or trojan delivery mechanism. The PDF contains a large number of external links, suggesting it functions as a link farm. One of the primary external links points to a URL that appears to be part of a malicious campaign.

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 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.
  • 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://maypoin.ru/strik?utm_term=sistema+mexicano+de+alimentos+equivalentes+grupos+de+alimentos PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413575/normal_5ff1098d530a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385004/normal_601cbcac410b6.pdfIn PDF document text
    • https://pedomolakikivo.weebly.com/uploads/1/3/4/4/134440841/zevironewib_tuxugefewi_lifidabok_vasatit.pdfIn PDF document text
    • https://nukowerijusez.weebly.com/uploads/1/3/4/3/134320067/10656.pdfIn PDF document text
    • https://jomunibudax.weebly.com/uploads/1/3/4/3/134342604/3020569.pdfIn PDF document text
    • https://paxituzupinemof.weebly.com/uploads/1/3/5/3/135303349/7024708.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388065/normal_5fc92f6657a00.pdfIn PDF document text
    • https://kowasazupajobex.weebly.com/uploads/1/3/1/3/131383373/545440.pdfIn PDF document text
    • https://duzopotubesafes.weebly.com/uploads/1/3/4/8/134890215/xonaf-zizopiziderurok-gunel-wawilipunuwo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410030/normal_5fc897062e062.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499635/normal_5fcce6459ddee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366344/normal_5feb259e178c3.pdfIn PDF document text
    • https://bevarolemi.weebly.com/uploads/1/3/4/6/134685224/5448698.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450259/normal_602f3f61b4e46.pdfIn PDF document text
    • https://jadusulad.weebly.com/uploads/1/3/4/7/134764450/sitarat.pdfIn PDF document text
    • https://doxeraja.weebly.com/uploads/1/3/1/8/131871607/6266027.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/f92e2805-7131-41aa-a152-1e8c1f649690/94501164701.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c2a66e8-9ec1-4a76-bcdb-97acf49cc604/sustainable_development_goals_report_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e731ece-9b37-40f8-a9d0-d42d7d9d8d45/parkour_games_pc_free.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000120c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C6 2180 bytes
SHA-256: e33d873c5dc597f47a0cb9ac80420578f8e39683c8c309d06f13e8b82796a7b6
font_01_sfnt_off00012aea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AEA 5632 bytes
SHA-256: 2542a5c022fc37bae4b9f087cd9b77fe23258b0e1810bf91efa6d3e2c148ea05
font_02_sfnt_off00013de6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DE6 13056 bytes
SHA-256: 9ee32cd6e10f07f2194a3888f94869dab5717955581b2dbab41c8989811a22a6
font_03_sfnt_off000167ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167EE 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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