Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7888efa53e038ea…

MALICIOUS

PDF

76.4 KB Created: 2021-06-13 16:53:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 8f551543808ed9316c2eab0b5fa5a5ef SHA-1: b113ba5db2c3f33c799ffeb48bf46ff1733d3a51 SHA-256: e7888efa53e038ea2d83a526c8a2a0c39a9501a82e788b41c39088838a496073
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is https://coretry.ru/pbw?utm_term=roland+barthes+death+of+the+author+analysis+pdf. While no scripts were extracted, the PDF structure and heuristic firings indicate a malicious intent, likely related to phishing or malware distribution via the linked content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://coretry.ru/pbw?utm_term=roland+barthes+death+of+the+author+analysis+pdf PDF link annotation
    • https://lunejuwibamir.weebly.com/uploads/1/3/4/5/134587588/mebarelo_sipasi.pdfIn PDF document text
    • https://vokafevevuw.weebly.com/uploads/1/3/4/3/134320681/85f34744489.pdfIn PDF document text
    • https://keminozabigorez.weebly.com/uploads/1/3/4/8/134886120/bobupoxitiwobek_madusubawirugik_wosevemuma_jiranigitol.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/9cee77bf-9130-43b1-81e6-2b403d8df888/lusozeteviguperak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/938f0698-292a-4117-a1ce-f07602475096/35059707184.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62265132-a76d-4a5c-9def-e03265928d82/59862203138.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7726e0d-6aee-4783-802b-d03c81a5d3cb/triangle_congruence_proofs_examples.pdfIn PDF document text
    • http://rutarotovez.pbworks.com/w/file/fetch/144646032/new_atm_card_request_letter_format_pin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4dfee13-aee2-4103-b052-90dc5a4923b6/zafasopotosiguwomimil.pdfIn PDF document text
    • http://luxufubetapi.pbworks.com/w/file/fetch/145252347/rocket_league_clans_to_join.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0008591c-395a-4755-9da4-15194ccc3ff4/asus_p6x58d-e_windows_10_drivers.pdfIn PDF document text
    • http://jajafad.pbworks.com/w/file/fetch/144420015/61992626876.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/677c397b-d998-4db4-bcd1-3c4286c7c1d9/dnd_gel_polish_536.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ff71255-cac0-490b-a821-dc3887e7b509/nesilud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c685d4f-9ce3-4010-b29b-fc782563419c/the_mortal_instruments_movie_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94b4d549-26bb-4c4f-a3df-ae7c2917785a/pazifabin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/453478b9-0835-49da-a9be-2c4363ee676a/non_destructive_testing_training_philippines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45bf4e35-9121-4779-b84b-877893c0cc18/joy_sexton_the_outsiders_packet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/041e949b-a8eb-43f6-afcd-33d1a3d4e0da/58232529973.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0979566a-e000-4d5c-982d-48608e586186/48074460728.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a71be2ab-73a6-4887-b900-5f98245797ca/eva_luna_nueva_book.pdfIn PDF document text
    • http://paderukut.pbworks.com/f/hey_there_you_with_the_sad_face_lyrics.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_off0000ed1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1A 5380 bytes
SHA-256: c2a3a872fe536404cb34fa3a596f3d47f327de38e7263a4d4ccbfda6f349a7da
font_01_sfnt_off0000ff62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF62 10744 bytes
SHA-256: c53b10b68a5427f7db53907d7bfb663d1600101d0c3ae147ee11d8f4a637c0ae

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