Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1214c9f6c85ebeb…

MALICIOUS

PDF

73.9 KB Created: 2021-03-06 02:19:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 599e42dc5c514b75a4bbb3d086e17b4f SHA-1: 913559bb7f8776e16790064fee61e3f7cb799f46 SHA-256: d1214c9f6c85ebebcbe725a0e8d21d3ca0827e1f2c2738be1fcbe0d69f9afd28
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 0.9998

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://fokemale.ru/wix?keyword=azur+lane+mod+apk+3.0.19 PDF link annotation
    • https://xuxerativizujaf.weebly.com/uploads/1/3/1/0/131070719/buwijajirevutetum.pdfIn PDF document text
    • https://fuxiwuzepideka.weebly.com/uploads/1/3/1/3/131381491/sotepiwisarepix-tevirijuja-kevusik-nufezixipudogal.pdfIn PDF document text
    • http://sekodosara.22web.org/how_to_charge_a_jazzy_select_power_chair.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454429/normal_601b603a8fb6e.pdfIn PDF document text
    • http://smilex.club/84374077091ffk9z.pdfIn PDF document text
    • http://kiwedoro.66ghz.com/daffynition_decoder_5._3_worksheet.pdfIn PDF document text
    • http://idealica-official-it.website/rpg_maker_games_android_apk1n698.pdfIn PDF document text
    • https://sewetupowak.weebly.com/uploads/1/3/5/9/135971958/jibizitogeramik.pdfIn PDF document text
    • http://muguwadijalipov.22web.org/how_to_collect_peanut_bush_in_hay_day.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476140/normal_60062cda6ef3c.pdfIn PDF document text
    • https://jexafowasefuxuv.weebly.com/uploads/1/3/4/5/134588667/xajoxusada.pdfIn PDF document text
    • https://fiwerabonu.weebly.com/uploads/1/3/4/3/134347662/zatedakemel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zujitix.epizy.com/48059464186.pdfIn PDF document text
    • http://kanulinuwuri.epizy.com/41092730550.pdfIn PDF document text
    • http://wamunezufim.rf.gd/churrasqueira__gs_char-_broil_performance.pdfIn PDF document text
    • http://ziwejozaz.epizy.com/52262942706.pdfIn PDF document text
    • http://lokimutopilar.epizy.com/18583573147.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_off0000e607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE607 5576 bytes
SHA-256: faf8b3b2d000f8e053561d593054747fc3db414866a87f180b842c862352ff3f
font_01_sfnt_off0000f8f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F9 9868 bytes
SHA-256: 6f974f291f3e6393143c78579284f4f2820c94c629d86d0308c7fe8eb7d92704

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