Malicious PDF — malware analysis report

Static analysis result for SHA-256 36ec17f393fe32ac…

MALICIOUS

PDF

83.3 KB Created: 2021-04-07 10:22:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 634e551fe5e8c0d4ad88fc4119ba59c1 SHA-1: 1208da79e95711e03f021659fc826da2f788349e SHA-256: 36ec17f393fe32ac20b5194c1d680321913f701770ed5999d1a4792424a18c9f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL leading to a domain associated with malicious activity. The document body, though partially corrupted, suggests a lure related to weight loss, likely intended to drive users to the malicious URL for further exploitation.

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://soxebez.ru/strik?utm_term=is+a+100+calorie+deficit+enough+to+lose+weight PDF link annotation
    • http://tamakar.xyz/29963050299zlrrr.pdfIn PDF document text
    • http://s7hmus.org/how_to_structure_a_startup_business7ouk1.pdfIn PDF document text
    • http://ita-bio.space/clockwork_princess_quotesmfkgm.pdfIn PDF document text
    • http://parhelifrl.space/misagarosujullkos.pdfIn PDF document text
    • https://cdn.sqhk.co/mowaxuso/ipBUsV2/vojox.pdfIn PDF document text
    • https://cdn.sqhk.co/vovomafejuwa/hgjhBif/pinosebemal.pdfIn PDF document text
    • http://o-karte-kopilka.com/sat_math_practice_test_1_answers3f7j2.pdfIn PDF document text
    • https://cdn.sqhk.co/woluzadeviv/sSiijE5/27636970797.pdfIn PDF document text
    • http://usblighter24.site/tilefizelisilotomunuzetcanrj.pdfIn PDF document text
    • http://gallery-shop.site/99087169096x1cj1.pdfIn PDF document text
    • https://cdn.sqhk.co/zagusebipin/Jiaji9L/skin_maker_3d_for_minecraft_apk.pdfIn PDF document text
    • http://uniques.space/strongs_exhaustive_concordance1khd9.pdfIn PDF document text
    • http://copyrightnotices-form.com/how_many_calories_are_in_a_cheesy_bean_and_rice_burrito_from_taco_bellz9d7a.pdfIn PDF document text
    • http://hesap-al-sat.com/bell_lets_talk_picture_framel4ctf.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/zurovajij/vudipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6b8e530-c923-4f7b-b04d-a2a0fb94ff39/tupopegeneralulero.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/manual_de_usuario_impresora_hp_deskjet_2545.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20edfb35-e6d5-4a3c-b7a6-82b76b66b6c0/25059881623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d69514b-2cf2-479b-86a4-3aee05f446fd/newabajatu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43a903a4-6794-4b77-a060-bac4e1a39cc0/walige.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe567ef4-c944-40f9-86b3-319477d792cc/dutisinulimaseropop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec25e2ad-2837-46f7-9e41-e5fd842f5f60/17902474860.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

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10598 5508 bytes
SHA-256: 48feacb5a5fc9b8de37ab9482dbaee1a90e349c2f2310d48964e66b9a65cc786
font_01_sfnt_off00011865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11865 11028 bytes
SHA-256: 948a297bb14e0eed3d55e68afae00071f52e657954ff874da69ca305357a6d50

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