Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe1062001ad1c974…

MALICIOUS

PDF

66.4 KB Created: 2021-03-23 05:22:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9df6a80f4ac133dc05b958add5352b74 SHA-1: 96b0fa8b9ff29e1669775f99cef504cc06d905bb SHA-256: fe1062001ad1c974bfc3e61a244a614eeb918c8c42ec15d552bbd1f5c9fc4cd6
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://pelibifir.ru/123?utm_term=coconut+tree+climbing+robot+report PDF link annotation
    • http://didazema.mypressonline.com/blinded_by_your_grace_piano_sheet_music.pdfIn PDF document text
    • http://zibikudupe.mywebcommunity.org/delonghi_ew7707cm_home_depot.pdfIn PDF document text
    • https://cdn.sqhk.co/bosamame/aghOhay/block_tank_wars_2_premium_hile_apk.pdfIn PDF document text
    • http://gokawojop.scienceontheweb.net/pneumonia_atpica_pediatria.pdfIn PDF document text
    • http://rajajime.mypressonline.com/dirk_gently_s_holistic_detective_agency_download.pdfIn PDF document text
    • https://cdn.sqhk.co/rurufimibiwe/hgiaFjb/4244845071.pdfIn PDF document text
    • https://cdn.sqhk.co/lewikokezina/hbBM4t7/46743565728.pdfIn PDF document text
    • http://lukufogud.getenjoyment.net/nipujoxoxasomik.pdfIn PDF document text
    • https://cdn.sqhk.co/givesaxi/jghdje5/kamen_rider_city_wars_mod_apk_2020.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/bezutu/voxujirewinowin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/617157c2-bdbb-43ac-a5b7-b20ead99e4e0/choc_tan_dachshund_puppies_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/53694115577.pdfIn PDF document text
    • https://60b161a2-b511-46bc-b48c-7ca4331f2db3.filesusr.com/ugd/34b71b_5df0e0b2286b4f34855545c92edb52b2.pdf?index=trueIn PDF document text
    • https://30de3caf-c510-4ce9-8691-b8280dc60d9b.filesusr.com/ugd/4980ee_d567507d537243599dd23ead29d111e4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffff8873-dac5-4ce9-a657-9f33f9c5f512/10062318402.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5a063e1-c91b-4897-b754-23a24b5212d3/31105957126.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/riven_top_guide_season_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a97428b-fbf5-466c-afa3-3382fac0b61b/liduluzoxufamod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3afbed8-0e2b-4f9f-9447-15a634aa051b/persuasive_essay_topic_sentence_starters.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_off0000c9ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9AB 4912 bytes
SHA-256: a545c3d713631872a6c81d0d86473881ccfdc328f6a5d815ba35b70596896eb7
font_01_sfnt_off0000da49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA49 10092 bytes
SHA-256: 37745f21b5a27823104d65abf601f2bc6e7954d3e7cef9696c1639d60881426b

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