Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fe565c2490c29c2…

MALICIOUS

PDF

79.8 KB Created: 2021-05-26 05:09:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 538d813bcb890b67f5425ae9c4db0064 SHA-1: 97a8262d609d0ddef8f348c888819e7cca941c73 SHA-256: 3fe565c2490c29c2d7cf795821066b2185b1d0e6e537a2947379e838d5cb6e18
186 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. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. One prominent URL, 'https://dugedepap.ru/strik?utm_term=buddhism+plain+and+simple+book', is likely the primary malicious destination. The document body, though heavily obfuscated, appears to be related to the book title used in the URL, indicating a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 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.
  • 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://dugedepap.ru/strik?utm_term=buddhism+plain+and+simple+book PDF link annotation
    • https://pegufozexak.weebly.com/uploads/1/3/5/3/135317465/8407959.pdfIn PDF document text
    • https://xoregofejaba.weebly.com/uploads/1/3/4/6/134651656/4e950bc6f5.pdfIn PDF document text
    • https://mikatafa.weebly.com/uploads/1/3/1/3/131398449/6128793.pdfIn PDF document text
    • https://seporarutigofu.weebly.com/uploads/1/3/2/7/132741198/fijeguviwoxifu_supijus.pdfIn PDF document text
    • https://navitadewota.weebly.com/uploads/1/3/4/0/134017874/fefofoxanegopus-jufuvekizebuwa.pdfIn PDF document text
    • https://babivefe.weebly.com/uploads/1/3/5/3/135312435/8871411.pdfIn PDF document text
    • https://genizeregadivov.weebly.com/uploads/1/3/4/7/134709948/4691511.pdfIn PDF document text
    • https://mevagosulen.weebly.com/uploads/1/3/5/3/135391340/kazilololomoros.pdfIn PDF document text
    • https://jopakawinotu.weebly.com/uploads/1/3/1/4/131407654/todefako-wumit-japudakiputo-buputatodipule.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xetasif/architectural_design_standards.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/ubuntu_bootable_usb_stick_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeb13a46-72f8-4ce5-8439-cd2ff4249003/iso_image_windows_7_32_bit_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/what_is_the_definition_creative_development_in_early_childhood.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2bda21c-26eb-4727-abde-0fbf4812f3a6/left_behind_movies_in_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09ed678e-cc2c-499e-b41a-32b6465cec44/how_big_is_a_1_8_scale_rc_car.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed489e1e-ceaa-439f-8689-11fcd7c3c208/oster_bread_machine_ckstbrtw20_paddle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72396de1-ff32-40bd-8de7-c53954ee6688/introducing_python_2nd_edition_github.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/ansiedad_y_depresion_en_estudiantes_universitarios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3a39858-444b-4378-aac7-63337ce3217b/tubotakumugenen.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/laconia_nh_police_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df34b257-2f69-45f6-89ce-cd8ac8824d7b/moxuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ccdd44c-2681-4eae-83c7-0e3932a2c7b7/what_is_a_good_diet_for_prostate_health.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA3 5156 bytes
SHA-256: d4a0d3693890c33541045a375be2bb843521d282281b0dfcc22c3c7a5f8bef6e
font_01_sfnt_off0000fff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF1 10344 bytes
SHA-256: f30b81e15d2d2acb86f61faca4e20dc0094a62d4a155912a0bc5463d46606778
font_02_sfnt_off0001233d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1233D 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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