Malicious PDF — malware analysis report

Static analysis result for SHA-256 89f2c2d6be95ce97…

MALICIOUS

PDF

72.6 KB Created: 2021-06-03 04:14:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 4cb7f2b755bd7332d45574438e45c4f8 SHA-1: c68fa9eceeb1e7bf5f8655793eb914648de5d4d4 SHA-256: 89f2c2d6be95ce9703fd4436ef5c2551bc693cbd6113494967ca3839c19a2555
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 0.9997

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://medvor.ru/pbw?utm_term=trucos+de+injustice+2+android PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4373985/normal_5feb984231a5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492915/normal_605cb063bb754.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404313/normal_6063421a3d11f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413242/normal_60287d63c8d1f.pdfIn PDF document text
    • https://baboromet.weebly.com/uploads/1/3/1/6/131606353/laverukovi.pdfIn PDF document text
    • https://pozebukewif.weebly.com/uploads/1/3/4/3/134330137/kixuxalaro.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383464/normal_5ff8c32fcad97.pdfIn PDF document text
    • https://feposogasutam.weebly.com/uploads/1/3/1/3/131384530/somojegosobu_sozugewasonu_wivufogiv.pdfIn PDF document text
    • https://fuviwezajoz.weebly.com/uploads/1/3/1/3/131379384/27f22b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444657/normal_6000404299b8b.pdfIn PDF document text
    • https://makodute.weebly.com/uploads/1/3/4/6/134649936/5279007.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403128/normal_602dd4756e0d5.pdfIn PDF document text
    • https://fupefomaxoxaje.weebly.com/uploads/1/3/4/8/134897629/baf2a2c.pdfIn PDF document text
    • https://gujaninarenuwin.weebly.com/uploads/1/3/4/3/134319279/8030500.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://joxakuruvi.pbworks.com/f/letter_format_for_fire_noc_renewal.pdfIn PDF document text
    • http://faxamom.pbworks.com/w/file/fetch/144460422/how_to_get_the_mystery_box_in_ww2_zombies_groesten_haus.pdfIn PDF document text
    • http://gazoridixilu.pbworks.com/w/file/fetch/144509487/how_to_litter_box_train_a_flemish_giant_rabbit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d2b50a0-aba3-46d2-8247-d4a3d9d631e4/do_your_best_scriptures.pdfIn PDF document text
    • http://xetibubib.pbworks.com/f/farming_simulator_18_android_apk_obb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e14448cb-5379-4beb-99d4-06651428ebf1/nuance_power_advanced_download.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_off0000dcb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB0 5056 bytes
SHA-256: c5c2275a6f1fd41509742062be25d1d2dbd137a4b08f9540e1398b14baadf608
font_01_sfnt_off0000edf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF0 11488 bytes
SHA-256: 84dfa0adf684e997cb7fc3b086f8840266dcbacfbc8f8ebb82a54bb1af889beb

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