Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab809c96d0640212…

MALICIOUS

PDF

74.0 KB Created: 2021-03-24 21:25:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a76fb8f9ae65593ab631078b1ea89ee9 SHA-1: 717c2c0617af60537a8d1bf2675e3b9f98b56906 SHA-256: ab809c96d0640212e14da10e71604edcece23b475f594f43c78a06483c0b4e09
126 Risk Score

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 0.9960

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://golowaki.ru/wix?keyword=aashto+pavement+design+guide PDF link annotation
    • https://sukonusumetuf.weebly.com/uploads/1/3/5/2/135294143/6810955.pdfIn PDF document text
    • https://detatabuloto.weebly.com/uploads/1/3/5/3/135346227/f349e4c.pdfIn PDF document text
    • http://volupixo.mygamesonline.org/organic_functional_groups.pdfIn PDF document text
    • http://fegalaro.iblogger.org/how_to_uninstall_mendeley_desktop.pdfIn PDF document text
    • http://potawuzaj.medianewsonline.com/dewalt_733_dust_collector.pdfIn PDF document text
    • http://bukudix.getenjoyment.net/54467447828.pdfIn PDF document text
    • http://sunazeremitiwu.mypressonline.com/personal_vision_statement.pdfIn PDF document text
    • http://wotidoteked.mywebcommunity.org/57909867647.pdfIn PDF document text
    • http://fodefon.getenjoyment.net/quenching_in_gm_counter.pdfIn PDF document text
    • http://jemulobapamiwu.mywebcommunity.org/vinekipamepegirafirixer.pdfIn PDF document text
    • https://fifurinirolegif.weebly.com/uploads/1/3/5/3/135306558/1d1cc4c8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zuvuzevo.atwebpages.com/zumaxijebazusepu.pdfIn PDF document text
    • https://679cd94f-bb1f-411a-9684-d99498fe93d6.filesusr.com/ugd/ce16d4_baade00e718f4f4ab07bad76fe22687d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/37769087473.pdfIn PDF document text
    • https://fa202315-5cd5-4006-9a99-7c5d4406650e.filesusr.com/ugd/61804c_11ec4e078c1741b6a3b9de707743c696.pdf?index=trueIn PDF document text
    • https://78151a86-a557-4e49-81aa-a2539eea45c7.filesusr.com/ugd/204f4f_8142a91e12774095a06176513166d986.pdf?index=trueIn PDF document text
    • http://terumalok.atwebpages.com/thinking_in_java_italiano_download.pdfIn PDF document text
    • http://luvewon.epizy.com/webiwifexubopakafav.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/91966080587.pdfIn PDF document text
    • http://gekuxexotomilo.epizy.com/how_to_replace_water_filter_in_kitchenaid_fridge.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/63402164923.pdfIn PDF document text
    • http://wokarodefi.onlinewebshop.net/lowoxi.pdfIn PDF document text
    • http://lemujiv.epizy.com/lanovupetuju.pdfIn PDF document text
    • https://411be8f8-4ba1-40b5-9edf-cc4a2c3d5ecc.filesusr.com/ugd/a86d68_9a1e48e2823f4ea8ac6a103aeefc6ecc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wulagisi/sajozanatuxinemoge.pdfIn PDF document text
    • http://tefixifurelo.epizy.com/feedback_amplifiers_notes.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_off0000e3af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AF 5296 bytes
SHA-256: 984e4db4b3009e6785d2ad5f19eec758c6cfd6b2515feab0dda3ee5b6707d176
font_01_sfnt_off0000f59a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59A 10832 bytes
SHA-256: ba642373616b645d8c374f02f6508e61516debfb446b3f67491bcca4d8b19b56

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