Malicious PDF — malware analysis report

Static analysis result for SHA-256 96263175e5de548b…

MALICIOUS

PDF

73.8 KB Created: 2021-03-22 07:03:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: a1255a9712f31bdb95d4c7dea7f8e2aa SHA-1: cb7660bdb3e5427bd71f32d6d954b546cd7f4755 SHA-256: 96263175e5de548b4ea790427a12b150869bd62174b901e296939c0f25adcd4b
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF document employs a social engineering lure, instructing the user to install a browser extension or update to view content, a common tactic for credential theft or malware delivery. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of multiple unknown URLs, including one with UTM parameters, suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://gimoguvi.ru/strik?utm_term=reznor+heater+for+sale+canada PDF link annotation
    • http://dujojiwasemob.mywebcommunity.org/kodojaxeputuker.pdfIn PDF document text
    • http://chambrehub.xyz/messiah_in_judaismmwj95.pdfIn PDF document text
    • http://kazimibi.getenjoyment.net/75283103185.pdfIn PDF document text
    • http://shopwithsale.website/sig_p938_ankle_holster_reviewsg3479.pdfIn PDF document text
    • http://jusapp.club/gaggia_brera_fixd01sm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366637/normal_6047b005675d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447097/normal_6008f8c97aa4d.pdfIn PDF document text
    • http://resapus.scienceontheweb.net/irrigation_engineering_nptel.pdfIn PDF document text
    • http://circus.market/barbra_streisand_songs_freeyaahr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386595/normal_60296b3e208dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403818/normal_60170a9625386.pdfIn PDF document text
    • http://mojadejazisapa.sportsontheweb.net/6461660930.pdfIn PDF document text
    • http://finuxezanasa.mygamesonline.org/design_of_concrete_structures_by_nilson_darwin_and_dolan.pdfIn PDF document text
    • http://tokudujadi.medianewsonline.com/oster_roaster_oven_instructions.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
    • https://uploads.strikinglycdn.com/files/de69e852-c5af-4eab-a34d-1f7fdc8656d2/58660957489.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcc48626-e0ae-43b0-8594-5cd9eee52a3e/dark_alliance_2_xbox_360.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/827af917-643c-4111-bb4c-e141be437cdc/8752320637.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d009ec1-6860-4142-83ca-95639774edaf/chocolate_peanut_butter_thunder_cake_recipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d33705c-2082-4819-8a72-be49b01b3445/how_to_crochet_hair_with_a_bobby_pin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eb83e4c-05e9-4326-913c-fb6882b3a8c2/knot_tying_ceremony.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cd7deb7-b311-4a4f-9827-8b03395fdeca/binary_covalent_compounds_worksheet_answer_key_mr_franz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/988b4df8-40ea-47fa-b289-ae56d93bc23c/wikutadifenenaramifinaxew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b32e264d-37b4-4e26-8956-2af61518482c/storyboarder_tutorial_for_beginners.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d46d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD46D 4908 bytes
SHA-256: f42700b24a021dc858cb13dee33de22c709865ace08f4ee8e25b40c93abc1d2b
font_01_sfnt_off0000e518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE518 11460 bytes
SHA-256: f1bf27f38fdbecc1e2f69cdb474f054b46ff4e0b7238707946c4c048ef1d2ac2
font_02_sfnt_off00010b80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B80 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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