Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff52d6207b23fe97…

MALICIOUS

PDF

71.9 KB Created: 2021-03-28 05:40:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 05653a587ec52a34cd0d000146a7983a SHA-1: 5793607ee039f85455939a8a931edfb232ce6bf6 SHA-256: ff52d6207b23fe97db48b4c5d6135486dec600f044a1988c5002a11d59fda170
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 0.9991

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://midufefew.ru/wix?keyword=blank+car+magnets+office+depot PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380228/normal_60317618b1c16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366325/normal_5fc9c34a87c06.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405195/normal_5fecf582832ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426679/normal_5fd6c58bd6df8.pdfIn PDF document text
    • http://piter.store/sazobatogopirogusatbm98.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://rineset.xyz/old_school_house_music_song_listwyt68.pdfIn PDF document text
    • http://silver35.ru/black_and_decker_40_volt_hedge_trimmer_partsqsy4v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413846/normal_60542b966fa2d.pdfIn PDF document text
    • http://giveaway2020.info/examen_resuelto_enlace_quimico_2_bachilleratoxws5y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465709/normal_603d44c37e642.pdfIn PDF document text
    • http://titoto.xyz/bhavageethe_amma_ninna_edeyaladalli_freewmjzq.pdfIn PDF document text
    • http://idslim-italia.site/freckle_juice_book_coverqajh0.pdfIn PDF document text
    • http://cuzinfo.ru/591814520850w9jq.pdfIn PDF document text
    • http://sodalabs.pro/zuledenexanageserikueqb3k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480148/normal_60297eea66ea3.pdfIn PDF document text
    • http://persequenteamsohbet.com/pugizojobuparudalusamurox5lq1s.pdfIn PDF document text
    • http://daimontimur.org/269174965439gl8o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382790/normal_5fda812600a87.pdfIn PDF document text
    • http://icub.tech/cuando_es_el_dia_de_la_madre_colombiazkcxs.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/59fc1700-c4c8-4aec-9990-a2f32e42e92c/robin_hood_disney_songs_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c593d6d7-4012-4f7b-8366-f5e59854c4b6/pojegixudivinow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28eb253c-95d5-4760-b11f-31f22054935f/luvategezulirij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef859b4f-5203-4a63-a9ce-b88d249f5fa2/81752127536.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec62f289-9e86-4abd-8bf4-45c776074b76/is_graco_snugride_snuglock_compatible_with_click_connect.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_off0000dc22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC22 5588 bytes
SHA-256: 5d7fce83cc64ec173932a0a991be1347175c91fc57a52bebe7acf856ecd14d25
font_01_sfnt_off0000ef18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF18 10236 bytes
SHA-256: 2dd240e205658680a975e96c91ea05bab0033ff643516e3f16a6b8f0ccb645bb

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