Malicious PDF — malware analysis report

Static analysis result for SHA-256 39da7915d584459a…

MALICIOUS

PDF

99.5 KB Created: 2021-05-08 20:15:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4857a869544631bbc97be09f7df31638 SHA-1: d7c5a10af63a1177ce030b679cb4247d0a8338c3 SHA-256: 39da7915d584459aafd81cde0d94d97df7e55cc11df5129d1b63e0e68b8e435b
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 0.9988

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://midufefew.ru/strik?utm_term=navpers+1070+bah PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450248/normal_60559a6e2fd87.pdfIn PDF document text
    • http://potawuzaj.medianewsonline.com/troy_bilt_4_cycle_weed_eater_oil_in_air_filter.pdfIn PDF document text
    • https://cdn.sqhk.co/podiwilur/Uk2heje/green_ringtail_possum_geographic_distribution.pdfIn PDF document text
    • https://cdn.sqhk.co/nawakema/gjhehg3/hachi_japanese_grill.pdfIn PDF document text
    • http://dadivasim.sportsontheweb.net/female_body_language_love_signals.pdfIn PDF document text
    • http://nujagexurej.medianewsonline.com/57738067561.pdfIn PDF document text
    • http://fuckfrsky.com/3412019468548hpd.pdfIn PDF document text
    • http://rezltml.xyz/lazijedur4rrel.pdfIn PDF document text
    • https://cdn.sqhk.co/duwewofowus/Ajajajh/jozemak.pdfIn PDF document text
    • https://cdn.sqhk.co/suxunuke/kC2BBZy/kobufepibujukufiwiku.pdfIn PDF document text
    • http://itverys.space/67630381651irz1a.pdfIn PDF document text
    • http://trysalon.xyz/37283818206ytmfc.pdfIn PDF document text
    • http://help-feedback-amzn8.xyz/babu_i_love_you_pictureewuvj.pdfIn PDF document text
    • https://cdn.sqhk.co/tekuligote/agDhahi/neripovetuzesubojop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393018/normal_605abc853a378.pdfIn PDF document text
    • http://sewatumafuta.medianewsonline.com/english_urdu_dictionary_download.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455197/normal_6012e9f647790.pdfIn PDF document text
    • http://xitimudajejo.mywebcommunity.org/58265962258.pdfIn PDF document text
    • http://copyrightsupportforlnstagram.com/incarnate_construct_3._5_templateobqfx.pdfIn PDF document text
    • http://musomojil.mywebcommunity.org/funza_lushaka_application_form_2020_nwu.pdfIn PDF document text
    • http://tryici.xyz/xopopedodosokekisej27ek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mawidinivetobi.myartsonline.com/kekuloneti.pdfIn PDF document text
    • http://jeximojela.myartsonline.com/garodosovapopaxupotafuw.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012e26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E26 5320 bytes
SHA-256: 1cff2cb675d732821a03911c36f2e05a191654298bc6d0c8c3ab43443889010b
font_01_sfnt_off00014046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14046 12272 bytes
SHA-256: a85e5020c7a72a9580e59223e62489982e3c2ff6095decc5b5643aceacf379db
font_02_sfnt_off00016a40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A40 16140 bytes
SHA-256: 2732c78df68b4531e26da51a256f0f9ab881cb8a96d1886ade34872d88eeece3

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