Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ff7cd62d4d434ed…

MALICIOUS

PDF

81.5 KB Created: 2021-03-31 09:20:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ed6f8d78ff09f74f7aedcf22047f7dfb SHA-1: 57fccd9c5887f681f92019f7e5da99860dc3bc39 SHA-256: 7ff7cd62d4d434ed037a4e27602732cc8ca967f4f358fda888432397a28078ac
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 0.9957

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://druttle.ru/aws?utm_term=how+long+can+baby+be+in+uppababy+car+seat PDF link annotation
    • http://jijipefifi.iblogger.org/dell_e6410_specs_i7.pdfIn PDF document text
    • http://abreudesigns.com/pevunozifuv8qrcz.pdfIn PDF document text
    • https://cdn.sqhk.co/wegifopi/sgSiejh/41043309243.pdfIn PDF document text
    • http://navalny.design/what_is_the_folk_song_of_indonesia362dm.pdfIn PDF document text
    • http://nokasosozigof.mypressonline.com/what_does_daring_mean_in_texting.pdfIn PDF document text
    • http://taxevidel.medianewsonline.com/65465861478.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373797/normal_60119763ee439.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404123/normal_6033e4d13514b.pdfIn PDF document text
    • https://cdn.sqhk.co/bemaxopig/d4he2P7/edf_smart_meter_not_showing_electricity_usage.pdfIn PDF document text
    • https://cdn.sqhk.co/guvevifowo/agihiSA/13212242701.pdfIn PDF document text
    • http://kusafomidufe.mywebcommunity.org/84331283504.pdfIn PDF document text
    • http://center-about.com/54697575285omewh.pdfIn PDF document text
    • http://powerpoint4you.ru/what_is_the_best_online_stock_trading_site_for_a_beginner_in_canada54su1.pdfIn PDF document text
    • http://vogeposekuxav.66ghz.com/cad_welding_procedure.pdfIn PDF document text
    • http://copyrightsupportforlnstagram.com/how_to_do_a_care_plan_reviewriq3g.pdfIn PDF document text
    • https://cdn.sqhk.co/darojopul/jjhFxjf/pasisomojimezivinojor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470821/normal_60349ba81b3a7.pdfIn PDF document text
    • https://cdn.sqhk.co/tubadaluzafu/7KFQTVL/flower_care_app_android.pdfIn PDF document text
    • http://difavusimope.iblogger.org/canadian_girl_guide_cookies_vegan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403404/normal_5ff0da760748b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xobabikek.rf.gd/dalanerizez.pdfIn PDF document text
    • https://dc273c12-e125-4738-b2e6-b96bc4bd5eb7.filesusr.com/ugd/c8df25_c94c3cf9969647d194644561c6505a4c.pdf?index=trueIn PDF document text
    • http://pepagipil.epizy.com/73384557589.pdfIn PDF document text
    • https://c01188fd-d8af-4b86-846b-090f7ecd58d8.filesusr.com/ugd/9058e5_93e4ed0bd06c4ffcb073f635811d910d.pdf?index=trueIn PDF document text
    • http://xijewixevav.onlinewebshop.net/holt_algebra_1_textbook_answers.pdfIn PDF document text
    • https://3bdad275-8828-414d-9063-9532e035d791.filesusr.com/ugd/c67d0c_8b47627de5c345b8b265c84efd072a1f.pdf?index=trueIn PDF document text
    • http://koxolavomuzo.myartsonline.com/powoba.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_off00010019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10019 5396 bytes
SHA-256: 5920ed328fa5b4965d408822154e4dfcf1907cd6e2ada6a35c01ef4550afac94
font_01_sfnt_off0001129b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1129B 10948 bytes
SHA-256: 4b3562fdad1c7044a13c8621ace4b69b79ce75ac94420a65ebcb518b4cc4a874

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