Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bbfc08c1f5947d7…

MALICIOUS

PDF

70.5 KB Created: 2021-05-18 01:00:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f5b939271e5e36b877ec1c00cf35768b SHA-1: 23148538f092f9190a5861e606489ca87fb8bff2 SHA-256: 3bbfc08c1f5947d791fcb24276219aa18668059904cb5fe84bb61acb5a5cc8b4
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. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm designed to redirect users. The presence of external URIs and the link farm heuristic suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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://druttle.ru/strik?utm_term=engineering+mechanics+dynamics+2nd+edition+mcgraw-hill+2013+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421767/normal_6055fd1fae039.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476294/normal_600bbcc637a50.pdfIn PDF document text
    • http://vimebadu.22web.org/microsoft_certifications_path_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481847/normal_6056b8261c153.pdfIn PDF document text
    • http://jedugefipevama.iblogger.org/35876838032.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476002/normal_5ff71bbe6e09a.pdfIn PDF document text
    • http://nimuxixoxa.22web.org/dokuzumufutejukekiwixij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500201/normal_6033f955be4f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377656/normal_604781eb4db1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415518/normal_602ffb634fd0e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kanisisasulaba.rf.gd/fokivogare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e34ead2-cf98-4732-bd2f-dfe2d81d52fa/5957135898.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe2141fe-1ce3-425d-bfc6-6010adfa27bb/citizen_e650_strap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8f01904-23ad-415f-8e41-0603cb2533e4/present_perfect_vs_past_simple_advanced_exercises.pdfIn PDF document text
    • http://nozasunagon.epizy.com/guided_meditation_for_pain_and_sleep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6066a58e-df32-42aa-8793-91165fbb5d72/wheel_of_time_series_reading_order.pdfIn PDF document text
    • http://webataj.epizy.com/2038188888.pdfIn PDF document text
    • http://vezapuro.rf.gd/hotel_cash_drawer_count_sheet.pdfIn PDF document text
    • http://kinuzana.rf.gd/char_broil_propane_smoker_brisket_recipe.pdfIn PDF document text
    • http://tomafidom.rf.gd/flow_cytometry_review.pdfIn PDF document text
    • http://weweladegop.rf.gd/how_to_make_money_off_tiktok_live.pdfIn PDF document text
    • http://kowaromeke.rf.gd/catia_manufacturing_tutorial_book.pdfIn PDF document text
    • http://xazitew.epizy.com/answering_machine_meaning.pdfIn PDF document text
    • http://teporududa.rf.gd/67718283389.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e299fd3-eab8-4aff-80c9-81bca2cddd1a/algebra_and_trigonometry_4th_edition.pdfIn PDF document text
    • http://kubegixojarabax.epizy.com/cake_write_name.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_off0000d495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD495 6244 bytes
SHA-256: 7e88cce1085dba071d8192f24dbc60d326385f2b07ec9b9a9d370b13eb2bf80e
font_01_sfnt_off0000e9d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D7 9784 bytes
SHA-256: 302155f91636c8ef781518daf0f369eb72ee4394a41a802269a457281e77451d

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