Malicious PDF — malware analysis report

Static analysis result for SHA-256 808d9b4a6af02bab…

MALICIOUS

PDF

77.7 KB Created: 2021-05-13 08:12:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 02375b56b7043ed9bf30b1592ced0644 SHA-1: 91578acadaacec979557639708d4332123f1e606 SHA-256: 808d9b4a6af02babdf7eaa89253c92ca7f1d568ae54d86b2e3684558aa0977e6
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs pointing to disposable domains, and a heuristic identified it as a link farm designed for SEO manipulation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious 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://mezovuduw.ru/strik?utm_term=samsung+galaxy+tab+4+sm-t230+software+update PDF link annotation
    • http://marketitaly.pro/sidabafadugarurij34gpk.pdfIn PDF document text
    • http://espacecmb.xyz/vayan_y_furzalos_a_entrarn9j0t.pdfIn PDF document text
    • http://optamorem.com/4439140071654awc.pdfIn PDF document text
    • https://cdn.sqhk.co/paxepedamaxa/bigDjjM/molajogajat.pdfIn PDF document text
    • http://keto-menu.online/77038482040d9ok5.pdfIn PDF document text
    • http://spindlndou.space/honeywell_5110_safe_manualkiufj.pdfIn PDF document text
    • https://cdn.sqhk.co/sepagumal/fjhjjwD/npo_guidelines_for_infants.pdfIn PDF document text
    • http://joblanc.xyz/denelexixunavoxuxutejixz.pdfIn PDF document text
    • http://apple-fruit.space/fupowudajopurajufevikerewg541b.pdfIn PDF document text
    • http://prizinsta365.website/mojalzgcul.pdfIn PDF document text
    • http://christinaanddavid2019.com/how_to_write_short_stories_for_beginners4jfmr.pdfIn PDF document text
    • http://idealslim-ordina.site/how_much_does_a_log_house_kit_cost9yg8r.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/dtjcmuy/76865256731.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b44001c-e37c-4dde-9fc3-00d749e73016/96813090806.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/hardwoods_and_softwoods_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4417628-4f62-4cce-a734-8412c8a2bfe0/fudoxoxoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d0ba95b-3732-490a-9d1d-26a5d027f173/tejigenokonozifemewipo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e12e0cfa-6495-4126-b256-b57fe94faae2/tuparodegavawuporuweresos.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/bitbucket_client_for_windows.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbf9c3c1-a555-48a4-9ff8-5c3af7d8a3fd/monsters_vs_aliens_full_movie_in_hindi_watch_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46825ac2-56ce-4c42-9fa1-c37321716698/zalibe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a690d8d1-2a14-4e27-adc8-30f283faf072/38112118460.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_off0000ede8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE8 6424 bytes
SHA-256: abcc2271ab4b37443352227955e3b422dc5c3dd33efe97b5237f9e6a6061036a
font_01_sfnt_off000103ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CE 11036 bytes
SHA-256: f2717522e70fdf64fec0289e5c530cecf3fbb7754fb18e01913cd60bb8cfd083

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