Malicious PDF — malware analysis report

Static analysis result for SHA-256 2454691ec327eaad…

MALICIOUS

PDF

80.0 KB Created: 2021-04-17 21:42:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5e7822b361a55bb208ede796b44d0bc2 SHA-1: 74f222976f6702b3c740688c1024019b4ea65f0b SHA-256: 2454691ec327eaadc8cacc7e0dfbc240201c07c4452180bf0275b451c78b2596
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, with a significant portion pointing to disposable hosting and exhibiting link farm characteristics, suggesting a phishing or malware distribution scheme. The presence of 'utm_term' parameters in some URLs further supports a campaign-driven lure. No scripts were extracted, but the PDF structure itself facilitates the redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/strik?utm_term=the+doll%2527s+house+theme PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454436/normal_600e41e0a32c8.pdfIn PDF document text
    • http://sanogisiwelel.iblogger.org/31740709429.pdfIn PDF document text
    • http://dvertsoff.ru/mufepamcui6.pdfIn PDF document text
    • http://hamlikjorettoop.ru/vafelaxukh99.pdfIn PDF document text
    • http://idem-peshkom.ru/77260936390f4hn0.pdfIn PDF document text
    • http://irbestate.ru/what_are_the_main_three_types_of_natural_selectionqigbl.pdfIn PDF document text
    • http://sukaxebodaruju.iblogger.org/lipadazizajowex.pdfIn PDF document text
    • http://usecabinets.xyz/technical_writing_course_syllabushdua6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481516/normal_602311a3236f2.pdfIn PDF document text
    • http://chempion.coffee/bob_vaughn_zodiacw9byd.pdfIn PDF document text
    • http://livethailand.fun/destiny_2_warlock_pvp_guideklbsd.pdfIn PDF document text
    • http://grenkasalo4.xyz/how_to_train_your_dragon_ar_bookmwju9.pdfIn PDF document text
    • http://minuette.me/the_jesus_mysteries_documentarydojfm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412378/normal_5fde12ec20188.pdfIn PDF document text
    • http://copyrightviolationcenters.com/47916024895z7mxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454803/normal_5fe778a1dfee7.pdfIn PDF document text
    • http://verification-help.business/vlc_android_tv_usbtdre4.pdfIn PDF document text
    • http://1offpark.xyz/dosujeluxatevugug1n6f.pdfIn PDF document text
    • http://biomaniix.website/880030792366kvmu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://golifuwa.rf.gd/jurnal_tentang_biogas_dari_kotoran_sapi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/993fb69e-e84b-437b-931f-d88f048a72ff/99475232603.pdfIn PDF document text
    • http://wapudajikipidem.epizy.com/essentials_of_veterinary_bacteriology_and_mycology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e857064-6faa-4259-b65b-25138f512334/what_is_the_enthalpy_of_formation_of_fes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74efe9e5-9e1b-43cc-ba22-c779763a1137/what_are_the_pros_and_cons_of_tidal_power.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_off0000fea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA3 4744 bytes
SHA-256: fa35248d55e608ba920507d7fda905eb96c6380cae6f6786069cdde24cdae98d
font_01_sfnt_off00010ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA4 10528 bytes
SHA-256: 557710cdb5a80a31d92fefbb14b6a505ebe7a50718dfa65427ae38882a495c5c

Open this report in the interactive analyzer, or submit your own file for analysis.