Malicious PDF — malware analysis report

Static analysis result for SHA-256 94265221788b78f3…

MALICIOUS

PDF

77.1 KB Created: 2021-03-17 16:03:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 85f8f6928690db7403785a52941bc929 SHA-1: 5b32d3c887e783bbc25c68bd13eb0150cd132567 SHA-256: 94265221788b78f302b1eafa290a552fad227fe42e9d9fa28997914046d97e1e
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 0.9997

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://botokaw.ru/123?utm_term=coliforms+in+milk+fonterra PDF link annotation
    • https://cdn.sqhk.co/zegareguw/KiflyBL/shooty_skies_secret_characters_2018.pdfIn PDF document text
    • http://manamuposa.getenjoyment.net/what_is_the_latest_ipod_nano_generation.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415526/normal_6015aaa36524f.pdfIn PDF document text
    • https://cdn.sqhk.co/joziroluxu/hja0jbk/standoff_2_discord_espanol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416131/normal_603b7bd5afd72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370054/normal_600885b0ab6c7.pdfIn PDF document text
    • https://cdn.sqhk.co/sevigexew/UjeihyM/67256147322.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377408/normal_600aaac76011a.pdfIn PDF document text
    • https://webakutukulufu.weebly.com/uploads/1/3/2/6/132683024/6845075.pdfIn PDF document text
    • https://cdn.sqhk.co/xejexeremiso/26DzibP/zibapuroposix.pdfIn PDF document text
    • https://najunewuzerus.weebly.com/uploads/1/3/1/4/131408250/10082.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375199/normal_5ff9da1ad5402.pdfIn PDF document text
    • http://tesilav.sportsontheweb.net/68282873935.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/8dbbf034-ae57-41a7-a758-4d01164bc121/ryobi_bc30_weed_wacker.pdfIn PDF document text
    • https://709e7e89-b264-4d73-b757-064736ed86f1.filesusr.com/ugd/f523c3_ee58e052840140b4b67da9f2202faa80.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a50a97b-c141-4cdc-ada1-c031faa9f407/what_causes_your_dashboard_lights_to_flicker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd58df5c-0479-42a8-8712-0c32496352e5/dosigovosepemifojedig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d35d104-7ab6-41af-9b7c-12ff83c757cf/spanish_dictionary_english_translation.pdfIn PDF document text
    • https://234a0c07-d908-4261-bb83-16b3c96a9b04.filesusr.com/ugd/73e0e6_c18f38d5273b47faa89a97c3727cce2c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b652481a-1e43-4907-bd49-13cec28c8572/72_angels_of_magick.pdfIn PDF document text
    • http://zagupijalixi.myartsonline.com/64373057439.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_off0000f38e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38E 4884 bytes
SHA-256: 7ca0445089c5864209ba7074f2add83c814476ad8e6a48efa9d1bfd483386134
font_01_sfnt_off0001040e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040E 10332 bytes
SHA-256: 39387590c354f7cd07e57745aaebd916886587472eb7e8686089f25362342aef

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