Malicious PDF — malware analysis report

Static analysis result for SHA-256 c19e7b2b65308c7e…

MALICIOUS

PDF

79.9 KB Created: 2021-03-24 15:26:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3875739d95cee842cb184ce267eec8b1 SHA-1: 95aea151a85322f57e0820de78ee6e766e9663a3 SHA-256: c19e7b2b65308c7e1df32e633caf2cfb69ee8414a4b99c1143a1580c9f16aea8
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 0.9990

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://ponafet.ru/wix?keyword=stock+market+cash+flow+pdf PDF link annotation
    • http://ita-talia.fun/balbharti_marathi_book_1996lv0s7.pdfIn PDF document text
    • http://yourlivehelp.com/un_tubo_de_cobre_tiene_un_volumen_de_0.009_m3_a_10_c_y_se_calienta_a_200_c7v9ns.pdfIn PDF document text
    • http://stat-index-co.com/free_movie_maker_programs_for_windows_10v950o.pdfIn PDF document text
    • http://ogranicbio.space/skullcandy_shrapnel_wont_charge22sxz.pdfIn PDF document text
    • http://lamovingcompany.com/73397641736l9ppb.pdfIn PDF document text
    • http://reduslim-shopofficial.site/crisis_communication_plan_powerpointj4byp.pdfIn PDF document text
    • http://robot3.site/what_was_the_purpose_of_the_patient_protection_and_affordable_care_actykl66.pdfIn PDF document text
    • https://danudaxeki.weebly.com/uploads/1/3/5/2/135297903/gabilabedilipumeduj.pdfIn PDF document text
    • https://nomiviweran.weebly.com/uploads/1/3/1/0/131070579/b45ee3fc3c.pdfIn PDF document text
    • https://cdn.sqhk.co/vadezewe/iejgjIT/fold_up_bed_walmart_canada.pdfIn PDF document text
    • https://jevezorubik.weebly.com/uploads/1/3/4/8/134864628/4384055.pdfIn PDF document text
    • http://sunmarkt.ru/national_cash_register_repair_near_me3qxds.pdfIn PDF document text
    • https://cdn.sqhk.co/balaragu/n9jboja/magic_words_book_phil_jones.pdfIn PDF document text
    • http://prizinsta.site/somuvufusowaroneh7byp.pdfIn PDF document text
    • https://lawejuja.weebly.com/uploads/1/3/0/7/130740077/9653323.pdfIn PDF document text
    • https://gajokemijibefe.weebly.com/uploads/1/3/4/4/134467094/vawajuraremevu_neganago_walima.pdfIn PDF document text
    • https://cdn.sqhk.co/dakizenewa/nhhggdE/holst_mars_score.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/waxapoz/matupebageronusepap.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/tosupi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf4535c7-cbab-4170-8717-8a1a9cb6b07e/49916033287.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1228d87d-6fea-4071-9261-5735c1adf175/dark_souls_3_japanese_boss_names.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/aprenda_a_desenhar.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/86551792403.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b5ae931-d373-4d38-9be2-8fddc297f3ed/online_arbitrage_sourcing_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59861128-c58e-4c4d-82f7-707fa2809d03/harbor_breeze_lansing_42-in_brushed_nickel_ceiling_fan_with_light_kit.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_off0000f6f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F8 5656 bytes
SHA-256: 1d1c6deed774bdd65cd6ae2995d058e42bb8f711a9d8a27785357edb93c4418b
font_01_sfnt_off00010a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A27 11748 bytes
SHA-256: 935e8ffec400d08c8ea4c85c3b3cecb7b14c559caad15f1afe9a8f7f4b3832be

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