Malicious PDF — malware analysis report

Static analysis result for SHA-256 d49b2bf4fbb3dfad…

MALICIOUS

PDF

77.3 KB Created: 2021-03-12 03:48:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: afdb3608a3d9161547b55c812e316d68 SHA-1: 7b7711b9c150da75d591a0ebd8ba2f8cb012734a SHA-256: d49b2bf4fbb3dfad261e08421f4fbaed7ef6b0169f5a5a0a5f637e4f51bbb8df
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, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing campaign. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating the document is designed to host many links on potentially untrusted domains. No scripts were extracted, but the overall structure and URL distribution point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://xezojetit.ru/strik?utm_term=how+many+calories+in+taco+bell+crispy+tacos PDF link annotation
    • http://copyrightreports.com/10k_beginner_training_plankc0p9.pdfIn PDF document text
    • http://justiciaforjustice.com/bogidadogotosjflpa.pdfIn PDF document text
    • https://cdn.sqhk.co/komagiju/hsOjchc/wutetimejiwivida.pdfIn PDF document text
    • http://gexedufez.22web.org/53009031844.pdfIn PDF document text
    • https://cdn.sqhk.co/wamamuli/3ohcIia/hachi_hachi_galaxy_mall_surabaya_menu.pdfIn PDF document text
    • https://diwuxofemuji.weebly.com/uploads/1/3/1/4/131407179/8439396.pdfIn PDF document text
    • https://faboduvo.weebly.com/uploads/1/3/5/3/135343103/mugifugadivuder-gekafulaf-vikazoj.pdfIn PDF document text
    • https://cdn.sqhk.co/doxowite/UJ0EkgB/46111981197.pdfIn PDF document text
    • https://cdn.sqhk.co/fipakebeb/jcSidjj/photo_studio_near_me_open_today.pdfIn PDF document text
    • http://216tilford.com/puck_stopper_crossword2ojbk.pdfIn PDF document text
    • http://libralab.digital/nicomachean_ethics_book_2_chapter_4_summarykgk6s.pdfIn PDF document text
    • https://guxovixig.weebly.com/uploads/1/3/5/3/135317997/folobaxupogowosubuli.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/89360179-c35c-4de8-8df8-efec28137f78/sugokebuwu.pdfIn PDF document text
    • http://pupokimixuveted.epizy.com/menexoguma.pdfIn PDF document text
    • http://femodizabofowu.epizy.com/avatar_last_airbender_game_for_android.pdfIn PDF document text
    • http://detotoga.epizy.com/82758139237.pdfIn PDF document text
    • http://zovaner.rf.gd/cafissimo_pure_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d891692-3a93-4ff5-a94f-09ce33a1d98c/types_of_curriculum_vitae_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b947bdc-e964-407c-8f2a-cb763ae7b8e8/minuet_in_g_guitar_notes.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_off0000f183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF183 5376 bytes
SHA-256: d36d8798aeeb3c760d781c69f15c66df7c3fbc300030e70549cae1a509a19714
font_01_sfnt_off000103c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C3 10504 bytes
SHA-256: 80f885dbca44c6a0d298af1f95960d6e65b5ac1d3d989aa6ca0a1fedb8579715

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