Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7c957fc196b7da5…

MALICIOUS

PDF

69.9 KB Created: 2021-03-22 05:47:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 064f7bdddcee59a525eb4d6ca959f5bd SHA-1: 81c9b9c88fcec3404841fa78aa29c0ce37d53032 SHA-256: d7c957fc196b7da523f9c43d40a9bdeb6f8ec0c64c2ec801d4fcd433d53f662e
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 0.9996

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://lozipotod.ru/wix?keyword=global+history+imperialism+in+africa+worksheet+answers PDF link annotation
    • http://ergors.space/968658952018gybq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386618/normal_601c8a982895c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418167/normal_5fcebd923b4c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459320/normal_60001602c2235.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378846/normal_5ffcc6a077a96.pdfIn PDF document text
    • http://mon-compte-cmb.best/vugotefejogikuwanukkhnx.pdfIn PDF document text
    • https://cdn.sqhk.co/remigalakefo/uthd0ia/narcos_cartel_wars_hack_no_human_verification.pdfIn PDF document text
    • http://zodelem.mygamesonline.org/31064885214.pdfIn PDF document text
    • http://cmb-eco.com/unchain_my_heart_sheet_musicspqis.pdfIn PDF document text
    • http://bu-markett.com/72214603870fp32r.pdfIn PDF document text
    • https://cdn.sqhk.co/fagiseregu/hjideEk/telugu_background_music_ringtones_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458428/normal_5fffe9822a8ff.pdfIn PDF document text
    • https://cdn.sqhk.co/dajuzafum/igjaSvh/daily_planner_2020.pdfIn PDF document text
    • http://eurozone.pro/34483285024ypfof.pdfIn PDF document text
    • http://goldenframecollision.com/75920432453373gn.pdfIn PDF document text
    • http://nulatapukedu.scienceontheweb.net/dadapowomug.pdfIn PDF document text
    • http://lnstagramverifiedbadge-media.com/806021598020y4ks.pdfIn PDF document text
    • http://lugabev.mygamesonline.org/black_and_decker_bm3b_charge_time.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/magapeguwabe/5645911191.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/76748609080.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/luzojekugofapolenapifonu.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/53135044098.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_off0000d478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD478 5684 bytes
SHA-256: 84193a45e811ec4f7cbc81bcab26416e1974b14df529cb8fc2e2582a069c967d
font_01_sfnt_off0000e7b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B5 9984 bytes
SHA-256: 3207ef4fcd8f301443f3fad047addee9832088cb29d627e3ddbd60410b065101

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