Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c4aa4b7580d3e30…

MALICIOUS

PDF

81.9 KB Created: 2021-03-05 09:04:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 17e1b3401101b53016e9c5c5df9b9f00 SHA-1: 21389196bb422edc9c5889664ca9240ba79b32f5 SHA-256: 1c4aa4b7580d3e30420664ec5be0019b7abf99c87a39b4b8e847213ecf8d355d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=5+paragraph+opord+example PDF link annotation
    • http://kefojixesopu.66ghz.com/saaho_bang_bang_song_naa_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/rQFoqhd/fumarutupuvebelotakadi.pdfIn PDF document text
    • https://cdn.sqhk.co/vadetegubufo/Mggjigf/pabavutegemunesexaxufobiv.pdfIn PDF document text
    • https://cdn.sqhk.co/simizekovogi/gi2d7ig/boo_2018_movie.pdfIn PDF document text
    • http://creampiepow.club/bhojpuri_film_linkc5p5b.pdfIn PDF document text
    • https://cdn.sqhk.co/mekerijiwuv/agigjij/fobolefajegepumuneko.pdfIn PDF document text
    • https://cdn.sqhk.co/tamaladafa/shehhhb/wuxegitosizokelusutuk.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/iik7jg7/64719353713.pdfIn PDF document text
    • http://zotusomadelisok.22web.org/dka_guideline_facebook.pdfIn PDF document text
    • http://citrus-fruit.space/86685420811l0s8e.pdfIn PDF document text
    • http://rubisteq.online/zumebipozigokupagodojejowxsmkp.pdfIn PDF document text
    • https://cdn.sqhk.co/semiwewedazi/wFghUjb/walkthrough_fall_guys_game_xbox_one.pdfIn PDF document text
    • http://forkidsshop.online/gijezakorc54fq.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/acce8f1b-3b90-4ee2-adc2-55e4bb66db7b/britax_endeavors_infant_car_seat_manual.pdfIn PDF document text
    • http://votitagupen.epizy.com/30680498684.pdfIn PDF document text
    • http://masomivi.rf.gd/76343275942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bea836d-f611-40bc-9891-4df2dd979601/tobasi.pdfIn PDF document text
    • http://wivonuwexewixir.rf.gd/busqueda_de_informacion_en_internet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebbc2bc6-8b69-428e-aebd-481112ecd184/how_to_sample_itunes_songs_in_garageband.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8be389d3-379e-4aaa-b8a3-eb62fb8b489a/ziviluv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e055e653-4b39-4a33-b6e1-c6f0d23c13a6/gilediretofurukexamebu.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_off000103a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A7 5292 bytes
SHA-256: cb3c612793e59299b973417a61e038b1fc3b00053ee3595a8418a4e694f572b0
font_01_sfnt_off0001157b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1157B 10856 bytes
SHA-256: 8acdecfb93055d8ae0f4fdce8635b112fd48b57169b57f6461e531339c423ea6

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