Malicious PDF — malware analysis report

Static analysis result for SHA-256 52337ce5289a3f07…

MALICIOUS

PDF

77.0 KB Created: 2021-05-09 12:55:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 10f43d469b8750ea4003b7a2cf397034 SHA-1: c998465b4b857674c13775b383f3ae7c4e90e8a2 SHA-256: 52337ce5289a3f0785cb5b2daa60e933cb2ec8a2556387a87f181bbba87e3e88
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and employing UTM parameters, indicative of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of external URIs and the link farm heuristic indicate the document's primary purpose is to direct users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/strik?utm_term=siemens+thermostat+rev24+not+working PDF link annotation
    • http://jaxifas.getenjoyment.net/wexodilovigijirakanatumez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408336/normal_604e271227861.pdfIn PDF document text
    • http://rejasepilibuxep.iblogger.org/statistical_inference_garthwaite_jolliffe_jones.pdfIn PDF document text
    • http://pumorux.medianewsonline.com/digital_electronics_interview_questions.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373983/normal_6036cf685eb66.pdfIn PDF document text
    • http://rexasokozeg.iblogger.org/zaniwamu.pdfIn PDF document text
    • http://tefiwofo.22web.org/tracheostoma_pflege.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417315/normal_60069ae482a1c.pdfIn PDF document text
    • http://rawoxaxevog.mygamesonline.org/zupitefenovexixeli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411717/normal_60106a41c3c88.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409811/normal_60078a29a2631.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/zevutebulaworel/dancing_on_my_own_vocal_sheet_music.pdfIn PDF document text
    • http://xozujojunesu.epizy.com/bitumen_testing_lab_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ffaa1b0-4181-427c-9e6a-b027ce977722/88057430136.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/muzasemesakedamij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0918012e-076e-4b04-9b05-cb4f2b14a18e/21353599241.pdfIn PDF document text
    • http://tefetuzuzip.myartsonline.com/ayala_corporation_annual_report_2020.pdfIn PDF document text
    • http://bavalibonoz.rf.gd/pikobadusizigiziwazoxag.pdfIn PDF document text
    • http://sizikipap.epizy.com/apsc_full_form_in_camera.pdfIn PDF document text
    • http://kizufalugomux.atwebpages.com/83947418162.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_off0000ee17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE17 5604 bytes
SHA-256: 8e5b0152abdba99c59426027b8809dfd4ac32dde2a74b6547d7858882e65b416
font_01_sfnt_off0001011d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011D 10412 bytes
SHA-256: 229580f7bf887d36ebf4d632d53ada50295a08b4f514e049100fc86e93a66d3c

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