Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d1cf37d11b7a905…

MALICIOUS

PDF

75.6 KB Created: 2021-04-01 06:49:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06ee28fcb9963abdb72ee202328a28c8 SHA-1: d05031dd17094adfd88c69d9af9edbab90c63c5d SHA-256: 8d1cf37d11b7a905eeaf46847beb1760c2dfd9fc98d55dc3db9beac6747a597b
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as Pdf.Phishing.Trojan. The presence of embedded URLs and the heuristic PDF_SEO_LINK_FARM indicate the document's primary purpose is to redirect users to potentially malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/strik?utm_term=blackstar+id+core+10+specs
    • http://melivoxigozige.mypressonline.com/2417568347.pdf
    • http://bometaximom.scienceontheweb.net/positive_adjectives_list.pdf
    • http://uptodate.site/how_to_check_transmission_fluid_on_2004_dodge_dakotakarsx.pdf
    • https://munuradon.weebly.com/uploads/1/3/1/8/131859370/zuviwevolomofesone.pdf
    • https://rumitubo.weebly.com/uploads/1/3/4/5/134525427/mekaxajofofut.pdf
    • https://sileperu.weebly.com/uploads/1/3/1/4/131406390/7083650.pdf
    • http://theharaka.online/setting_up_your_fishing_pole_for_troutfui7p.pdf
    • https://cdn.sqhk.co/vumorumuvogi/Yhfhagg/human_life_protection_act_alabama.pdf
    • https://cdn.sqhk.co/libibajuzumu/Mxjjgi1/cancer_care_ontario_breast_cancer_screening_guidelines.pdf
    • http://numberoone.xyz/how_to_do_a_cost-benefit_analysisv049x.pdf
    • https://pexigupor.weebly.com/uploads/1/3/4/9/134901766/papatogefowene.pdf
    • http://votapusi.mypressonline.com/20404203588.pdf
    • http://lupazul.mywebcommunity.org/jokowuvawuteguwutimum.pdf
    • http://prostotit.site/pomupugasatajepuzujmv47h.pdf
    • http://reduslim-europa.site/what_colleges_have_business_majors9knjn.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c6235d3f-7220-406f-9590-df785e4ddb3f/rogodakilexumab.pdf
    • https://uploads.strikinglycdn.com/files/fcceddc4-77bf-4862-8375-050abf545628/advantages_of_elaboration_likelihood_model.pdf
    • https://uploads.strikinglycdn.com/files/59fd829d-6286-421f-8e04-e0f8352582d3/algebra_1_online_textbook_mcgraw_hill.pdf
    • https://uploads.strikinglycdn.com/files/c643c509-7b22-468a-b2ac-84bd465da638/what_does_it_mean_when_it_says_take_2_tablets_daily.pdf
    • https://s3.amazonaws.com/jusuberu/brinkmann_gourmet_charcoal_smoker_setup.pdf
    • https://uploads.strikinglycdn.com/files/bd44e756-40b2-4498-a6a2-01d8cb510baf/wobuxagadetates.pdf
    • https://s3.amazonaws.com/zemigiduwagafu/backache_exercises.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7f5.bin
6f455c165dee75af17c15015d657317f39b0ab3f43101af253c5f87a5dbb4b59		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F5 5376 bytes
font_01_sfnt_off0000fa4b.bin
f3a9e25a0ab9232f4f8fe382cfa9b9633d8f93cf1a2cf3e5741e7ae84552643e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA4B 10936 bytes

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