Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa621bf81d70d64e…

MALICIOUS

PDF

83.9 KB Created: 2021-02-15 15:56:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 7957b1c5c22d1310c127090f849bc740 SHA-1: 8ce73f451d5efa901a400e4166c5acf399c37677 SHA-256: fa621bf81d70d64e3cbcd09876b8b6890c86ca4eb1754db1d3c8ffaf790350eb
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are hosted on disposable domains or link farms, suggesting a malicious intent to redirect users. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and link farm heuristic suggest it's designed to lead users to malicious content, potentially via embedded JavaScript or other exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/123?utm_term=how+to+repair+an+electrolux+vacuum+cleaner PDF link annotation
    • http://justamorem.com/12236496559wm3av.pdfIn PDF document text
    • https://magirakikepemun.weebly.com/uploads/1/3/4/0/134000039/kelagugokidax.pdfIn PDF document text
    • https://gedimonisesejed.weebly.com/uploads/1/3/1/1/131163996/7204834.pdfIn PDF document text
    • https://laxopewivizi.weebly.com/uploads/1/3/5/3/135394850/vowawokupulad.pdfIn PDF document text
    • https://cdn.sqhk.co/wubukuxivupe/WjiYHhc/zedge_ringtones_free_iphone_7.pdfIn PDF document text
    • http://all-system7.xyz/watchman_nee_on_prayercygqa.pdfIn PDF document text
    • https://cdn.sqhk.co/livefivepa/gsrhjje/block_master_para_minecraft_pe_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/bekutojeke/jSULQo2/74230374189.pdfIn PDF document text
    • https://cdn.sqhk.co/risejesob/gelqvth/deporurilora.pdfIn PDF document text
    • http://keksik24.ru/philips_respironics_system_one_remstar_auto_a_flex_service_requiredm7pmv.pdfIn PDF document text
    • http://getbuiss.online/sheet_music_symbols_fluterwime.pdfIn PDF document text
    • https://cdn.sqhk.co/pigajifaw/iicHidd/drift_life_speed_no_limits_legends_racing.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/cgiOjcm/waxojogifujivoruzujow.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/PkD8Qif/vitacost_promo_code_june_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/nasanoroge/0dGMhg2/51500701158.pdfIn PDF document text
    • https://woremudof.weebly.com/uploads/1/3/4/7/134701645/5853780.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobibab/hie5hdt/93959616832.pdfIn PDF document text
    • http://vkrowl.com/tebirokitofemojapavodix7c3yb.pdfIn PDF document text
    • http://pihodze.com/dmc_embroidery_floss_color_chart7f4w5.pdfIn PDF document text
    • https://pagafamowadaf.weebly.com/uploads/1/3/4/8/134878907/c3ce55c5c0844.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2C 4964 bytes
SHA-256: be5eb6c454b64dab0c86c6844d4461ebfa7961af2a21be7b5175b053b81e7373
font_01_sfnt_off00010e05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E05 11000 bytes
SHA-256: 1994b25ce74543d1ffd05857feb933fa07b5121f53d940b765c8f62d6b93d4f4
font_02_sfnt_off00013398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13398 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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