Malicious PDF — malware analysis report

Static analysis result for SHA-256 6779ed97cecdf0bd…

MALICIOUS

PDF

78.7 KB Created: 2021-04-04 00:57:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 056fddac11f4d89d8b5efcf10e09e225 SHA-1: c7c94b3fbe4ab2b04c83fc2a8e36815066732781 SHA-256: 6779ed97cecdf0bd762b6157612066f609512a75bfdadd7fb08e46c0b6655a41
66 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers as malicious. The document body, though heavily obfuscated, contains references to 'cd file recovery software free', suggesting a lure to download malicious software or engage in phishing. The presence of external URIs and link farm characteristics indicates an attempt to redirect the user to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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/123?utm_term=cd+file+recovery+software+free PDF link annotation
    • http://shop50off.info/the_double_exposition_concerto_form_differ_from_the_standard_sonata_form_in_thatjbqvo.pdfIn PDF document text
    • http://luchdobro.site/the_summer_is_gone_film_2018bswvh.pdfIn PDF document text
    • https://cdn.sqhk.co/zasemewiti/ifsjib4/run_run_rudolph_kelly_clarkson_guitar_tab.pdfIn PDF document text
    • http://datiwufirul.medianewsonline.com/xifadewajajopanudoka.pdfIn PDF document text
    • http://organic100.fun/86537273177w1a7l.pdfIn PDF document text
    • https://cdn.sqhk.co/rukugewul/tjcgfvS/cooking_fever_cheats_ios.pdfIn PDF document text
    • http://gilumesu.mypressonline.com/60618466448.pdfIn PDF document text
    • http://lnstagram-helping.live/the_5_levels_of_leadership_book5rdti.pdfIn PDF document text
    • http://wusumomijo.medianewsonline.com/xemubumafazisuxebaf.pdfIn PDF document text
    • http://pumorux.medianewsonline.com/22246835488.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://bepolujogox.atwebpages.com/3491480752.pdfIn PDF document text
    • http://gezexibubaju.rf.gd/platform_bed_plans_home_depot.pdfIn PDF document text
    • http://kebojupevanivi.rf.gd/62777108111.pdfIn PDF document text
    • https://627ea4a7-3f28-4bf3-8c99-6a9da7dacf48.filesusr.com/ugd/1970e2_51c85cef64994c0f8ee0b9b1b2705819.pdf?index=trueIn PDF document text
    • https://22520ec4-2132-45a5-98b8-54db1b71d3ea.filesusr.com/ugd/b33b96_fcaa98628ad342be82bfa87a157e57e0.pdf?index=trueIn PDF document text
    • https://e26976e3-f089-44cc-a2a6-54bcc6cae308.filesusr.com/ugd/0df15e_1f0f8573499f46fa811959e621bb827f.pdf?index=trueIn PDF document text
    • https://f7e05ffc-afae-4d19-be15-7e9c659e5e5f.filesusr.com/ugd/72f62b_4bf48a66866c4317a96ee70ad98ce254.pdf?index=trueIn PDF document text
    • https://63a0a607-6d1b-4b95-a813-f1b07cabc719.filesusr.com/ugd/ad56f2_3c2a1b5bc7be4a22bdb72d1c2c7e786a.pdf?index=trueIn PDF document text
    • https://1628ddcf-e301-416d-9649-d9339b85441b.filesusr.com/ugd/0b1079_c8c211f89c9c49fe8df4d8d7cecd8915.pdf?index=trueIn PDF document text
    • https://a6047d18-b57f-4fdc-88fa-dea7715a8642.filesusr.com/ugd/189347_3ef12e8c18f448e5b031827e96e04c3c.pdf?index=trueIn PDF document text
    • https://ac685e6e-6442-44c0-91a1-b3a367e79ef2.filesusr.com/ugd/ce77c6_fe8523a985334e7abfa9300ac956538c.pdf?index=trueIn 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_off0000ea23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA23 4972 bytes
SHA-256: ac05c78e6990c4c771656d2d537dc80ab11d3c7a1c6ef4c90ec17c5de67b8d8f
font_01_sfnt_off0000fb3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3B 10576 bytes
SHA-256: 441a1d4d3246d88bd3e7171ec3dda89f1e1959ecc443d741967735b2cfc8fb18
font_02_sfnt_off00011f5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F5B 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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