Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee6b25c78f997394…

MALICIOUS

PDF

123.4 KB Created: 2021-06-09 00:30:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2559346b82557065b6e646fc2df2c807 SHA-1: b717c9112be77e60d1b22a1c9ecb5d135cb50216 SHA-256: ee6b25c78f9973942ef2e5932908091c847505335f71298b8cba8cf942a0b6d8
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://midufefew.ru/123?utm_term=flight+club+movie PDF link annotation
    • https://fozikevogakol.weebly.com/uploads/1/3/1/4/131437046/janoxogorit_xataz_ludofu.pdfIn PDF document text
    • https://tivaxuxilo.weebly.com/uploads/1/3/4/1/134131375/caf6315.pdfIn PDF document text
    • https://netaterosani.weebly.com/uploads/1/3/4/4/134438803/wukob.pdfIn PDF document text
    • https://tenubufaz.weebly.com/uploads/1/3/1/1/131164261/6691fdce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd164dd2-c21b-4062-bd23-81a837fd4bdd/what_is_color_absorption.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec8ed6df-b0ee-452c-8d28-691e7ac24b03/azar_basic_english_grammar_ppt_presentations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/101c3ed8-e21b-4f80-9b8a-c49ad97b4739/69732532712.pdfIn PDF document text
    • http://vimadutukad.pbworks.com/w/file/fetch/144873036/how_to_play_game_on_chromebook.pdfIn PDF document text
    • http://mizunebapod.pbworks.com/f/write_a_newspaper_report_on_the_jallianwala_bagh_massacre_class_10.pdfIn PDF document text
    • http://zewalar.pbworks.com/f/fundamentals_of_abnormal_psychology_9th_edition_citation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3f1311f-3492-424b-bc6a-f557140ff27a/why_is_my_acer_computer_not_turning_on.pdfIn PDF document text
    • http://demopefo.pbworks.com/f/ridezuxuru.pdfIn PDF document text
    • http://wiliser.pbworks.com/f/how_to_get_good_standing_certificate_from_mmc.pdfIn PDF document text
    • http://kolelulu.pbworks.com/f/605134733.pdfIn PDF document text
    • http://bowawesup.pbworks.com/f/17706800408.pdfIn PDF document text
    • http://kepigiwup.pbworks.com/w/file/fetch/144500577/8336837965.pdfIn PDF document text
    • http://deburajuza.pbworks.com/f/bbc_broadchurch_season_1.pdfIn PDF document text
    • http://luwapoveduvi.pbworks.com/f/92909961599.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23ed5fc0-c6bf-42e6-b0d2-a8c8421107ff/delonghi_air_conditioner_remote_control.pdfIn PDF document text
    • http://niluputevi.pbworks.com/f/moxolulajufi.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_off0001a8b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A8B5 4884 bytes
SHA-256: 9b7bf0bd29380aaf4e6ff320d452e4ebb6948232f55bb7efac282fa3dbb6a82d
font_01_sfnt_off0001b942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B942 11700 bytes
SHA-256: 835c60b51c130ebce68b164edab49b516bfbafc6411b6afb19d02cbc7130137d

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