Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e33829cc8094c4f…

MALICIOUS

PDF

77.1 KB Created: 2021-03-18 09:38:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 2447fba5e1d61c055ce0234ee7e2acce SHA-1: 3223af8724e45677fa08c46f7f4578f5820ef97d SHA-256: 9e33829cc8094c4fdb7f9e0224e589806a7a5f394c847d6327718c1cb4488f7d
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'bologen.ru', which is likely part of a phishing or malware distribution scheme. The document's structure and embedded links suggest it functions as a link farm, attempting to redirect users to potentially harmful content under the guise of a game download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://bologen.ru/wix?keyword=fnaf+for+free+ios PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4476443/normal_5fdef2b7b3b8f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393489/normal_5fe2cedd89c10.pdfIn PDF document text
    • https://menesifewo.weebly.com/uploads/1/3/0/8/130814293/zufekujeg-zejebaveg-puwuw.pdfIn PDF document text
    • http://zoosalon.org/the_bell_jar_movie_release_date_2019l6xw8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369163/normal_601b0715a9714.pdfIn PDF document text
    • http://noworowuzafizog.iblogger.org/pimikidigema.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408865/normal_60358787f4235.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465685/normal_5fd30a891b871.pdfIn PDF document text
    • http://lnstagramverifiedbadge-media.com/the_crown_season_1_episode_7_accuracyf5w5i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460057/normal_603a0528dd2a8.pdfIn PDF document text
    • http://obmenkalnr.online/32643458929j1z6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459058/normal_60317e2b65ce0.pdfIn PDF document text
    • https://xatiletovolut.weebly.com/uploads/1/3/1/4/131409128/kijikufelubodejedi.pdfIn PDF document text
    • http://discount50.pro/94532353944sjja4.pdfIn PDF document text
    • http://antileqphh.site/mcculloch_3200_chainsaw_manuala72ij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402262/normal_5ffba008adb59.pdfIn PDF document text
    • https://kegewibenufugix.weebly.com/uploads/1/3/2/6/132682471/xokowoveto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446774/normal_5fdb00128aa29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410432/normal_5ff85367bb6f7.pdfIn PDF document text
    • https://xatawelakobij.weebly.com/uploads/1/3/4/6/134685719/zumibode-vawobi-zikirixelijex-guvamopefite.pdfIn PDF document text
    • https://jupoviladuxeru.weebly.com/uploads/1/3/4/3/134310568/a7a5e741.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xexagum.epizy.com/100_frases_en_ingles.pdfIn PDF document text
    • http://kegipufi.rf.gd/gefugereluzitilazaxarux.pdfIn PDF document text
    • http://vorasokipat.rf.gd/entrepreneurship_development_in_nigeria.pdfIn PDF document text
    • https://1b15a19f-c8c2-4d9d-8c2f-e97aa7ecfe2c.filesusr.com/ugd/eb6c48_efd303da9e7748e997c589353d6fae48.pdf?index=trueIn PDF document text
    • https://8eefcaf3-52f5-4123-8be5-b1f0aaeea45e.filesusr.com/ugd/1d3654_2c48b062907b4d68a80fd7cd83faa59e.pdf?index=trueIn 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_off0000f3a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A0 4684 bytes
SHA-256: 21fd4ab8bad82989775169718df916eef54f3e79ad4904c3fbc158984621e64f
font_01_sfnt_off0001039e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039E 10264 bytes
SHA-256: 6cae8baf03b7b77630ced094050287a7646d4123b92eb0409744b4cd3aaa5e3a