Malicious PDF — malware analysis report

Static analysis result for SHA-256 4965ca7e1a52ebad…

MALICIOUS

PDF

77.9 KB Created: 2021-04-04 23:03:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 73f4bf9bfa1b774bd0ba4ee28a308b15 SHA-1: b135d5796982fbd493d5f1ccb69e53e298fa910c SHA-256: 4965ca7e1a52ebad3e9d6730033938a0cb799b50ff20fb8f2e80ba5b2654ac48
134 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous external URIs, many of which point to disposable hosting and appear to be part of a link farm, suggesting a phishing or malware distribution scheme. The heuristic 'SE_DOWNLOAD_BUTTON' also indicates a lure for users to click and download content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/award?keyword=water+supply+and+sanitary+engineering+by+rangwala+pdf+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4455180/normal_5fd17e56c0b07.pdfIn PDF document text
    • http://kompledom.com/milkweed_book_main_charactersg6458.pdfIn PDF document text
    • http://muzoc.xyz/niv_life_application_study_bible_third_edition_large_print_leathersoft5qovz.pdfIn PDF document text
    • http://mesimewipotaz.22web.org/kibenumafofa.pdfIn PDF document text
    • https://nawenakugod.weebly.com/uploads/1/3/6/0/136048640/pupositiboloni-tovuni-zewijizapifew.pdfIn PDF document text
    • https://rofovotojoroko.weebly.com/uploads/1/3/4/8/134878837/b1509f4696b7e32.pdfIn PDF document text
    • http://nutristrike-shop.ru/6mm_aluminium_sheet_cut_to_size6t6yv.pdfIn PDF document text
    • https://lopuvekire.weebly.com/uploads/1/3/0/8/130813144/maguvetimu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410962/normal_5fe167fd20807.pdfIn PDF document text
    • https://babipuwoze.weebly.com/uploads/1/3/4/8/134865032/zijuluroguruma-difexizof.pdfIn PDF document text
    • http://procripton.com/comparative_degrees_of_adjectives_ex4gskq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495271/normal_5fd60ea06185d.pdfIn PDF document text
    • http://smotrikino.fun/50658089866io7pw.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/59d6a8ac-28c3-4595-b6ec-a28756a8c032/waxolopapapimozamesun.pdfIn PDF document text
    • http://vuzozan.epizy.com/45151792470.pdfIn PDF document text
    • http://nidexivoji.epizy.com/affinity_photo_workbook_espaol.pdfIn PDF document text
    • http://limazajot.rf.gd/2000_ford_focus_for_sale_by_owner.pdfIn PDF document text
    • https://57ead060-d7b3-4f59-a803-6c9b47c0028a.filesusr.com/ugd/f30481_cdfce35154f84115b5babed23bac3284.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/478a40f4-c95c-4520-b908-14f2c4d31477/26877962934.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3864d5c-0e27-401f-b623-1be4226475ec/38653270763.pdfIn PDF document text
    • https://f733e552-90a1-4d1f-83ca-a6b36afcf31c.filesusr.com/ugd/38bf1f_384a48458a9b4443b69a0a4eaced6999.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6dd0cca-29b8-4ba2-8f27-2d1fa9fd589c/26178121120.pdfIn PDF document text
    • https://2903667b-e544-4972-ac7f-e5855aaa9b37.filesusr.com/ugd/2cc660_37fd7422c65f402ba032f8c2bccfe6fe.pdf?index=trueIn PDF document text
    • https://71da2aa5-51c3-4f2c-ab18-08bbbad20131.filesusr.com/ugd/d216cb_11ee461722104cffa57a0b7dfa17d233.pdf?index=trueIn PDF document text
    • https://b354d503-40d1-4c97-84b4-bc0b16c12f35.filesusr.com/ugd/8c7d07_3921cfd2099c4c5998b4af9078a2b662.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/516918ea-d1ae-4adb-a6f8-e9f089646577/1331484262.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_off0000edec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEC 5556 bytes
SHA-256: 04463ac3602ace99ec389d5fac91f77f2e0c0b9b7f24ea11496cb363f0ef00da
font_01_sfnt_off000100fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FE 11440 bytes
SHA-256: d8249c4362c271f51d1e094c2646ea75359bde4f3ab5ae570ca81e1b34fbd44f

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