Malicious PDF — malware analysis report

Static analysis result for SHA-256 67e422670bb4b837…

MALICIOUS

PDF

98.0 KB Created: 2021-03-17 04:37:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1c126c5c6aab59105a0f9eb836c34156 SHA-1: 589f733c99ebfacaf01bb9cb34ceb449e19b750d SHA-256: 67e422670bb4b8378f3e67f0031c0f2e4d3f01a7ab464470d49f970727e0e2c0
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://dugedepap.ru/wix?keyword=ap+physics+grade+11+notes+pdf PDF link annotation
    • http://balegetiwep.mywebcommunity.org/what_is_a_good_hook_for_writing.pdfIn PDF document text
    • http://kujinatazema.sportsontheweb.net/20248477238.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kidojudal.epizy.com/72599990107.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/77422597783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5309b7b-7070-41d5-a823-3a7057128a98/how_do_i_connect_my_canon_pixma_printer_to_wifi.pdfIn PDF document text
    • https://8eeb1f0a-0cdd-4c66-98a4-83777b49fb54.filesusr.com/ugd/64f9d2_fe44f6e6e91a4b7ea4d8143220bb9898.pdf?index=trueIn PDF document text
    • https://fdf0fb27-5181-4190-8e1a-80fb86d87eb1.filesusr.com/ugd/2410c9_0447b018f528488b8c88c77d69f9830b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c400120-bed8-4994-87c1-d2bd129bc407/how_to_write_a_running_record_observation.pdfIn PDF document text
    • https://6ddb26ad-aa8e-4a3e-a925-5cef6fc035e1.filesusr.com/ugd/d3d820_57d011ca58a548fcbfe701c8abcebcda.pdf?index=trueIn PDF document text
    • http://nofelututuxop.epizy.com/authors_craft_anchor_chart_4th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fab8395d-3dc6-49b2-83a5-3b342e35bd5c/80208661216.pdfIn PDF document text
    • http://wowawese.rf.gd/45331548963.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/974e3fd4-496f-4d4a-bd04-216e2f608162/how_to_explain_too_to_a_child.pdfIn PDF document text
    • http://kozogasivufi.myartsonline.com/best_oil_paint_for_alla_prima.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e51d33fa-a64e-4ecd-a58b-bcea5dd9f701/how_to_connect_subwoofer_to_pioneer_amplifier.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/identity_thief_unrated_version_parents_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8dc41fd-5907-4d97-8897-0095759f45a5/flower_of_life_pattern_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/935afb3f-4384-4fa7-8dee-7e416858385a/59581111514.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_off000142f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142F8 5528 bytes
SHA-256: 0f1dd8e06d9f6d459f7ae9960dc0189c5a727976515440338c8f8b42beb8dde5
font_01_sfnt_off000155d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155D4 10720 bytes
SHA-256: b9655b5dbba52ca14a8a318aaef7428111e69867884c1832827070255fc23812

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