Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe3196ec87d1aeb0…

MALICIOUS

PDF

80.4 KB Created: 2021-06-08 13:28:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0300cd4966516f7f0e0b7b688c037ef6 SHA-1: ea3bc0ad1686822f7776fe23dc2050b56255a32e SHA-256: fe3196ec87d1aeb07811ea67171432355aeea2f2524218d5553c41dc47bef8f8
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 0.9998

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://wastran.ru/pbw?utm_term=how+to+measure+ear+plug+size PDF link annotation
    • https://pulimogub.weebly.com/uploads/1/3/4/3/134312020/wekivawexot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483856/normal_60609dc21d681.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403816/normal_600fd80597c23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459328/normal_6016a628db3f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424683/normal_5fded71a2363b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408993/normal_60114676eee27.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473384/normal_5fff03c64314f.pdfIn PDF document text
    • https://sujepofuk.weebly.com/uploads/1/3/0/7/130775011/75af2587.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fajopab.pbworks.com/f/99519953088.pdfIn PDF document text
    • http://luwivaj.pbworks.com/w/file/fetch/144487407/wasoje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34e1b522-8d43-4fde-b410-fe92f0c27b1e/84578832859.pdfIn PDF document text
    • http://dajodovilav.pbworks.com/f/type_a_blood_food_list.pdfIn PDF document text
    • http://nalujoxerisi.pbworks.com/f/11666748932.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4227a895-90ad-4071-9f10-738153f2fbbf/8116115604.pdfIn PDF document text
    • http://kufavuva.pbworks.com/f/netflix_mission_statement_2018.pdfIn PDF document text
    • http://lekipirunezi.pbworks.com/f/how_to_set_time_on_adt_quick_connect.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73b2d8be-7352-449a-9a30-827f4ae9624e/bates_guide_to_physical_examination_and_history_taking_13th_edition_test_bank.pdfIn PDF document text
    • http://xosufixemuf.pbworks.com/w/file/fetch/144442197/jofijepotikoxagufeseripe.pdfIn PDF document text
    • http://gomedaj.pbworks.com/w/file/fetch/144586683/mupujezuke.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_off0000fe54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE54 5240 bytes
SHA-256: 72b21f035a227f6c8125f430ce500f7c4d10673f2284fb05deb66e5f1a679b6a
font_01_sfnt_off00011024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11024 10752 bytes
SHA-256: b63c54a3d25a1b31545a74f02500138e4f43834b2df4f529d97ad136f4e5bc0b

Open this report in the interactive analyzer, or submit your own file for analysis.