Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f698910f9693a01…

MALICIOUS

PDF

77.1 KB Created: 2021-04-06 13:58:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 57b3e7af37148947802b21a4b8321755 SHA-1: 536782846e6fd127cd55ce15ae5fe2e5e2892c32 SHA-256: 9f698910f9693a01df9412e333113ee1f89e0b453c137da2335b90f6c5d72f2f
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 0.9993

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://botokaw.ru/123?utm_term=development+economics+pdf+book PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4493888/normal_600bd2e2d631e.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolefowi/jfUPjfv/free_beginner_acoustic_guitar_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/jidulopavoji/Fgffogi/radiant_heat_boiler_maintenance.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477369/normal_5ffb9109378fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405907/normal_6004fe7e4a790.pdfIn PDF document text
    • https://cdn.sqhk.co/wukatigubo/Igi2Ngg/64474035328.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374022/normal_5ffd0ceb38ffe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475729/normal_600d6b34f017a.pdfIn PDF document text
    • https://cdn.sqhk.co/jolodovi/g5gcqHP/jebaderoxasosexuvegevuj.pdfIn PDF document text
    • http://konujojijitezu.iblogger.org/kuporesu.pdfIn PDF document text
    • https://cdn.sqhk.co/tupuvebafo/WcHgg1d/game_online_terbaik_2018_android.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/benuka/50867816093.pdfIn PDF document text
    • http://ragudoduwe.epizy.com/33517332820.pdfIn PDF document text
    • https://a7176590-a44a-43b4-8b25-1171fb6190ac.filesusr.com/ugd/e6ccb8_a263780cee5d4199aad638e2ced32ac7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/how_much_is_hp_laptop_battery_in_nigeria.pdfIn PDF document text
    • http://kesazubajumat.rf.gd/dorimuk.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/2004_chevrolet_malibu_battery.pdfIn PDF document text
    • https://6a24fdd2-d4a5-4c4b-882b-0f3115751bcf.filesusr.com/ugd/04e6f9_4e6b871bc30040d0be8aae7bb328d07d.pdf?index=trueIn PDF document text
    • http://wejifofodig.rf.gd/the_crown_season_2_episode_10.pdfIn PDF document text
    • https://661c91a2-68a2-4ae3-aaac-ef96b6cc7894.filesusr.com/ugd/b926a8_b29ce979e1ee48a0b7402412bc7ef064.pdf?index=trueIn PDF document text
    • https://48cc712b-de5e-493e-a198-f8962849e22b.filesusr.com/ugd/d2751c_14cfb78fd9c94785a3e4c9901ff775bd.pdf?index=trueIn PDF document text
    • https://9764c975-acb6-4bd5-a3ff-b1f4624bc9bc.filesusr.com/ugd/5bcb7b_d45a55705abe42dab1e7f9388d097438.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/74606109146.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_off0000ee79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE79 5260 bytes
SHA-256: 8f3e46f16f9231ed73925336b5ba0c11d4b6429bbedc97b50535ae5acb21127e
font_01_sfnt_off0001005c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005C 10904 bytes
SHA-256: b3a48377344116ac8cfde648296bd62062692d6f763aa3c4965d6abc6ab987f9

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