Malicious PDF — malware analysis report

Static analysis result for SHA-256 0878fe89dd2f2e69…

MALICIOUS

PDF

82.8 KB Created: 2021-03-23 01:24:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5c9c780b532230ef84c2926513964b8d SHA-1: d5401178511137b516b05ac65f664d6215fca7de SHA-256: 0878fe89dd2f2e6940cacc22d0baa12493328529617d423d35133206c51bbfdd
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-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.
  • 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://crophysi.ru/123?utm_term=toefl+speaking+practice+test+free PDF link annotation
    • http://leyloften.online/25701372994hkv9c.pdfIn PDF document text
    • https://cdn.sqhk.co/mifopanikil/GqiiNG7/killer_bean_unleashed_cheat_version_download.pdfIn PDF document text
    • http://nakozovuzu.22web.org/dutudolumuvura.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizilo/a3pjhgI/reporters_today_contact_number.pdfIn PDF document text
    • https://cdn.sqhk.co/tilafukefuwe/d6ZxhfA/youtube_live_streaming_apk_download.pdfIn PDF document text
    • http://help-verifiedbadgecenter.com/reading_understanding_multivariate_statisticspzlie.pdfIn PDF document text
    • https://cdn.sqhk.co/xusarukave/hgXhhib/kasa_smart_wifi_light_switch_3-_way_kit.pdfIn PDF document text
    • https://cdn.sqhk.co/wujozuzewed/qih7jeC/rail_nation_bonus_code_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vipebajivakal.epizy.com/gorakhpur_aiims_information.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7967233-38b2-4a3b-aedd-7d85b119b925/beats_studio_3_wireless_manual.pdfIn PDF document text
    • https://656adf98-7a81-40bd-8d0f-2b9c27d09201.filesusr.com/ugd/268ab1_a826ef65a0364b429e929b2ada95d0ef.pdf?index=trueIn PDF document text
    • https://5e9816b5-e261-4a84-a5c7-594b6999e1c8.filesusr.com/ugd/eb2f7d_2f424734a7014dc2aee650c5ecccc4f3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd4f96eb-7bcf-4e91-b970-a32441d07595/organic_chemistry_lab_report_introduction_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdc90188-e652-4c08-8d8d-6c4f82839ca6/what_is_the_current_political_climate_in_south_africa.pdfIn PDF document text
    • https://a21f0d7d-5fe0-4a99-a381-3b18266e0880.filesusr.com/ugd/6c313a_e84388d42e6745909ad379d96c7a6f88.pdf?index=trueIn PDF document text
    • https://b32521b7-32ca-447e-9967-d27d0dce683d.filesusr.com/ugd/800b88_d04c3f7503dc402382affdef2b989721.pdf?index=trueIn 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_off000104c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C2 5196 bytes
SHA-256: af71b7ab079e2650834242941d8dc344010957ff9cd64a785c8d084db3661e42
font_01_sfnt_off00011688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11688 11140 bytes
SHA-256: 2a3066fbb521c63be298a75ac3eb7a2a0987b550b837ea1ad0d0ae30e53c9933

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