Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bf93215ac3799f8…

MALICIOUS

PDF

84.8 KB Created: 2021-03-11 21:58:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd643315393c5f144022c293ef0d3e4e SHA-1: 1b4955003b78e940a9f9cf96315838debe39dd83 SHA-256: 3bf93215ac3799f8173c74ccf9373e8d7a6fcc9f6d7d8591aa2d186a471592a7
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable hosting and link farms, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://golowaki.ru/wix?keyword=reecom+weather+radio+r-1650+manual
    • https://turexebino.weebly.com/uploads/1/3/4/2/134265835/8895192.pdf
    • http://jawixogu.mygamesonline.org/asus_p8z77-v_lx_compatible_graphics_card.pdf
    • http://xiwupulo.medianewsonline.com/tovonerefetoge.pdf
    • https://kitigenuripoduj.weebly.com/uploads/1/3/1/0/131070171/jegixalibe_buvidoj_fopezarejesu_kodenuwisajub.pdf
    • https://cdn.sqhk.co/tamaladafa/ihYzZBL/criminogenic_capitalism_definition_sociology.pdf
    • https://cdn.sqhk.co/xijogedobu/dZYLhhB/best_online_business_management_degree_programs.pdf
    • https://cdn-cms.f-static.net/uploads/4378606/normal_60176e090f929.pdf
    • https://cdn-cms.f-static.net/uploads/4461766/normal_60137aeb31fee.pdf
    • https://static.s123-cdn-static.com/uploads/4369788/normal_5fc76ee8882f2.pdf
    • http://gelufose.scienceontheweb.net/warapazutonesajobirupoto.pdf
    • https://cdn-cms.f-static.net/uploads/4480594/normal_602f8a44e8460.pdf
    • https://cdn-cms.f-static.net/uploads/4387433/normal_6044ccbed35d0.pdf
    • http://guzexesuge.mypressonline.com/is_there_a_sequel_to_harry_potter.pdf
    • https://dagakaxogofawi.weebly.com/uploads/1/3/4/6/134699425/4710454.pdf
    • https://cdn.sqhk.co/gapebeve/nBBhfgg/shoe_designer_fashion_shops_london.pdf
    • https://cdn.sqhk.co/merabuvi/ctMLWoo/fikajode.pdf
    • https://cdn-cms.f-static.net/uploads/4463266/normal_601e063b0cec3.pdf
    • https://dubozenerur.weebly.com/uploads/1/3/4/6/134687155/raxat.pdf
    • http://tibagisuminove.sportsontheweb.net/36250701341.pdf
    • https://nulabelavomeviz.weebly.com/uploads/1/3/1/4/131413951/fijapivup-kufigoxiti-sosore.pdf
    • https://cdn.sqhk.co/mozozezowos/hilQhiE/asphalt_nitro_cheats.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7819d837-b355-4640-bfe6-8f232262d0a9/pidazitesisawerololupozup.pdf
    • https://uploads.strikinglycdn.com/files/b028c02d-8298-41a0-bb0d-4e3e91c132d4/how_to_connect_to_an_ion_block_rocker_speaker_upgrade.pdf
    • https://uploads.strikinglycdn.com/files/706bb4ce-d5ee-43ab-b5e8-4200dfc25809/whats_after_juz_amma.pdf
    • https://uploads.strikinglycdn.com/files/982a0a63-c21f-4563-baf7-bd8a5fb3bd35/vidavolodovele.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d38.bin
445d2c236fcce72ba54cfa856bd0124f447f89cced6ba7a865052769af4cc1bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D38 5604 bytes
font_01_sfnt_off0001203e.bin
a449c5ecd06af6ccfcd337d5e64035c28cee977d4fa57505cc8945f6bd84a30c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1203E 10972 bytes

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