Malicious PDF — malware analysis report

Static analysis result for SHA-256 1408241c49e7933a…

MALICIOUS

PDF

79.9 KB Created: 2021-04-04 01:14:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a830dee07333054e9251052fec519d9a SHA-1: 58978cf35dfa215996949127b27728f925552861 SHA-256: 1408241c49e7933a65fca652e15f1e46ae179bd94c07d3977f3dc0f02d853cec
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/wix?keyword=free+money+generator+gta+5 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4394073/normal_601b109166fb3.pdfIn PDF document text
    • http://habercigo.com/15750033100i654f.pdfIn PDF document text
    • http://roselosudeve.sportsontheweb.net/lowrance_elite_4_hdi_prix.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/3986323352.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424043/normal_60359a0d1c7fa.pdfIn PDF document text
    • http://websporizle4.com/como_aprender_a_desarrollar_algoritmoskw9cm.pdfIn PDF document text
    • http://sushibara.net/dorabudiwiletuzoxulubuzewsyyxx.pdfIn PDF document text
    • http://birapemotafew.mygamesonline.org/brahma_kumaris_murli_english.pdfIn PDF document text
    • http://pubofumoxo.scienceontheweb.net/fabifibawibuko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453328/normal_604cc2fe621e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412591/normal_6008199fe2c65.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/5af6922d-4cd8-46a4-911c-d5523ab74324/faninerilumemavorel.pdfIn PDF document text
    • https://4121a797-204a-431c-92a8-8e24072fb342.filesusr.com/ugd/b972d5_038f92d77fa74bbeb0412cc455286f8a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6db4892-02f3-4956-a927-3de0a87eeb68/how_to_get_my_brother_wireless_printer_back_online.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/personas_toxicas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07a8afa0-c539-4947-af73-567f6036a4ca/how_to_set_up_blue_clean_power_washer.pdfIn PDF document text
    • https://ae0ecf71-49bb-4ac4-bba4-d0f2a20d1af9.filesusr.com/ugd/668a47_990c0aea718542c4bab2cb24a70e93fb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/nodemcu_esp8266_datasheet_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/nalikezevikemikobadafekiw.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/pogil_types_of_chemical_reactions_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/troy_bilt_tb230_engine_oil_type.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fef5840-4341-4c93-a179-96a054e375fd/30602618246.pdfIn PDF document text
    • https://fd0ef26f-7b8f-4c91-b3b2-19f7ec93487a.filesusr.com/ugd/4174bf_083285ff31d94cfebb45e3ed9a2d4ac1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d164f07-9fa5-4c22-b0bf-3f6b9851351f/philips_norelco_9000_prestige_vs_9700.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_off0000fb28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB28 4976 bytes
SHA-256: 88c06bcb98e6a7ece280389c2ab525f4aa4208930785bb38b75cd2adb9266c47
font_01_sfnt_off00010c12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C12 11076 bytes
SHA-256: 940a4ea6c8a9617c844a702a4c3aba68a7459f3e439e909e7332455f960b61f3

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