Malicious PDF — malware analysis report

Static analysis result for SHA-256 125d2e78d449fb24…

MALICIOUS

PDF

94.4 KB Created: 2021-03-31 17:22:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d2dae04e1c5a4643956b8df931707c59 SHA-1: 1bdcef95494584ace2235c52d92169de37a327a9 SHA-256: 125d2e78d449fb242191ffc63e9f55498ea4baaee2d10ff439841a98069c09df
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/award?keyword=bharatanatyam+mudras+chart+pdf PDF link annotation
    • http://wonder-ita.fun/lukatesemuzixesm913c.pdfIn PDF document text
    • http://ecoservice-vlad.ru/sierra_308_load_datae55dn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417141/normal_6015b95b86e16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379856/normal_5fe15e79e58fe.pdfIn PDF document text
    • http://eagleaff.com/rc73_remote_manualoo2eq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428061/normal_5fe50e5b7380d.pdfIn PDF document text
    • http://telozurilesojo.sportsontheweb.net/8086_instruction_set_and_assembly_language_programming.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417809/normal_5ffa19686ee0f.pdfIn PDF document text
    • http://gasurorir.sportsontheweb.net/what_order_should_i_read_the_expanse.pdfIn PDF document text
    • http://zoneeuro.pro/compare_rechargeable_vacuum_cleanersm5kv1.pdfIn PDF document text
    • http://deine-gabe.com/86336769081ta78c.pdfIn PDF document text
    • https://cdn.sqhk.co/kamozipu/LSyoiaX/kezusabux.pdfIn PDF document text
    • http://wbigs.space/critical_ops_apk_mod_2019s9eci.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425487/normal_5ffb17e40cfe5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481422/normal_5ff07bb43fe37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425759/normal_5fd152b59ffdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486060/normal_6060fa817aef0.pdfIn PDF document text
    • https://cdn.sqhk.co/fipakebeb/awRjbic/tavuwipadozapatosiki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413121/normal_6050659b4dc24.pdfIn PDF document text
    • http://eslife.pro/72686206741dxzql.pdfIn PDF document text
    • http://wssummer.space/bob_gear_revolution_flex_3.0_doublea379l.pdfIn PDF document text
    • http://supportcopyright.net/pemexezalefepikoxepaeg1qb.pdfIn PDF document text
    • http://mukinumatonewo.getenjoyment.net/metal_borides.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sajoveguduv.onlinewebshop.net/esv_literary_study_bible_review.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_off00011b3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B3F 5516 bytes
SHA-256: ad108120fbf02a2c1f4549931547e6f353c818dd9d8f9fd7e95f058d1a3f5e1f
font_01_sfnt_off00012de2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DE2 12092 bytes
SHA-256: 874a402c28fa0e5e85bfc22009264118e00a28b2561476f39646ccb474f6ff14
font_02_sfnt_off000156ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156AE 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953

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