Malicious PDF — malware analysis report

Static analysis result for SHA-256 248b0489c1961427…

MALICIOUS

PDF

78.5 KB Created: 2021-04-21 12:14:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 1a184038f14e40656957016404eb707b SHA-1: d76dbb60f1a2bbd0167f5caf29cbe16331083c85 SHA-256: 248b0489c196142739f2f876d2afd285be0b74d5182e941df532978d93f24874
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and heuristics indicate it functions as a link farm, directing users to external websites. The primary URL, https://golowaki.ru/strik, is associated with a phishing lure related to 'Virginia woolf orlando pdf'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

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://golowaki.ru/strik?utm_term=virginia+woolf+orlando+pdf PDF link annotation
    • https://siduwibe.weebly.com/uploads/1/3/4/7/134775996/jamijenesumewasemo.pdfIn PDF document text
    • http://copyrightsupporthelpcenter.com/resign_letter_format_in_tamilgkyzt.pdfIn PDF document text
    • http://kittyplay.online/washington_football_team_quarterbackqi2r6.pdfIn PDF document text
    • http://revershjtb.site/meritatawefesinopoj8ef6y.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416501/normal_6005f985b7aee.pdfIn PDF document text
    • https://mojivuza.weebly.com/uploads/1/3/0/7/130775228/cd9dfb6322.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413705/normal_5fda3e4c1d912.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486346/normal_6008929c4edfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464297/normal_60523826d9fd2.pdfIn PDF document text
    • http://mbfsopg.com/wopobi3q8sq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380545/normal_603def20aaff1.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/wibedubosateg/sheet_music_for_chain_breaker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88d91613-7e7d-4eee-8ad5-d1ae80b5d2aa/the_royal_standard_of_england_penn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b5b8c2a-3a9b-4d50-b31b-65d9ce6cf400/how_many_lumens__1_million_candlepower.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5f82ce1-c245-4145-96f8-236582ef58c5/xodonawagulutozazo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a606993-1820-4a25-9e92-a998ab267625/me_earl_and_the_dying_girl_movie_poster.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed883bc1-9f2b-466a-bef9-f3f5429431b8/2016_dodge_ram_2500_6.7_diesel_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/snap_on_torque_wrench_1_2_inch_drive.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/favolijunuvurerurogivajow.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_off0000f3d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D6 5088 bytes
SHA-256: 301bbade987a0d084f283016016b463bbca63d7dc8ce24db38290877a2696571
font_01_sfnt_off00010554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10554 11808 bytes
SHA-256: dde057a76f6014582a1424df04eb07e3025a20aefa7d7ab964043654108d1bac

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