Malicious PDF — malware analysis report

Static analysis result for SHA-256 8711f3f42864d476…

MALICIOUS

PDF

88.9 KB Created: 2021-04-05 07:13:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 8b45f0338e84c8c9cccc2621a0466342 SHA-1: 1a79ee40d672aa08a47ff46ffae3f2d03d944720 SHA-256: 8711f3f42864d476c8d3c8830eb53037bdb7792b9559da48fe8b669d881be3c5
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains and identified as a link farm, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dugedepap.ru/strik?utm_term=what+do+you+think+are+the+negative+effects+of+globalization+on+cultural+loss PDF link annotation
    • http://hamlikjorettoop.ru/create_your_own_cursive_worksheets_freehjmt9.pdfIn PDF document text
    • http://getsol.xyz/vabawamipaworusiges5z7.pdfIn PDF document text
    • https://vikumufum.weebly.com/uploads/1/3/1/3/131398575/62737730a041c.pdfIn PDF document text
    • http://kemamibuke.mygamesonline.org/xuroku.pdfIn PDF document text
    • http://thestablestl.com/43615064208heqrn.pdfIn PDF document text
    • https://situtewazugigev.weebly.com/uploads/1/3/4/2/134265876/boremupidam.pdfIn PDF document text
    • http://talakam.space/rebote_delay_31ncck.pdfIn PDF document text
    • http://beduzevitugok.mypressonline.com/centroids_statics.pdfIn PDF document text
    • http://allerop.xyz/vagasozukisomigixepivat0pqz.pdfIn PDF document text
    • http://yourcy.com/forward_financial_bank_onlineclz46.pdfIn PDF document text
    • http://copyrightreports.com/89454752499jnokq.pdfIn PDF document text
    • http://instgrmmverifiedbadge.com/haynes_gourmet_discount_code_ukxjo2d.pdfIn PDF document text
    • http://babysampler.com/hypernym_and_hyponym_worksheetsw5phm.pdfIn PDF document text
    • https://rikelakejif.weebly.com/uploads/1/3/4/8/134885243/2334431.pdfIn PDF document text
    • http://socialwave.me/13074220348d04ox.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/laradusa/89502027833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee1d0f9e-16a9-45b9-aaa9-23a0dccf691b/which_sat_chemistry_book_is_the_best.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea499f50-6759-4efb-a6c2-b7f0a0783233/37908512199.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed70d36a-2cf9-41b9-8878-b0fd0d74f057/bizisipepuvow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8a99b63-75c6-45e6-a265-8570ee001d04/97533221995.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/putezum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96e05139-25d1-4465-9211-1be1dc929e4b/ancient_egypt_magic_book.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_off00011b31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B31 5712 bytes
SHA-256: ecec9ed0e59126449618d1b52adb513086f590c5a750e7c1921f860a0e74ac80
font_01_sfnt_off00012ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC2 11352 bytes
SHA-256: e8629feb9f106d7b4c44574b6efdd517f7475e6a554b31ac0a96a29a605cd9e7

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