Malicious PDF — malware analysis report

Static analysis result for SHA-256 688e7bdce1b9149a…

MALICIOUS

PDF

75.5 KB Created: 2021-03-10 02:17:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0172bb3d7d6f7177a2b5d816c4e03b1a SHA-1: 92deb5b97ef449121cc87e997cf93ae0a8f0ec1f SHA-256: 688e7bdce1b9149aa8f91a95c758947744c89c1039fa23654e9cebf22e809424
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded URLs, with a primary focus on redirecting users to external sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for these links, suggesting a malicious intent to distribute malware or conduct phishing. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jottigo.ru/wb?keyword=journey%20to%20the%20west%20movie%201986 PDF link annotation
    • http://dronextactical.xyz/rorakedozatesazumwgssj.pdfIn PDF document text
    • http://premiumpornclips.com/55218514054t0om7.pdfIn PDF document text
    • http://micrometer25bill.site/9617840186462nao.pdfIn PDF document text
    • http://net-klientov.ru/a_series_of_unfortunate_events_books_1-138741r.pdfIn PDF document text
    • http://genoray.pro/the_jazz_standards_progressions_book_scribdrws6p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449000/normal_5ffad7770fbb3.pdfIn PDF document text
    • http://kimagibasip.22web.org/uc_browser_browser_apkpure.pdfIn PDF document text
    • http://pekibimige.mygamesonline.org/what_size_tires_go_on_a_2009_toyota_corolla.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386335/normal_5ff5c484cfd70.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422372/normal_5fcc029da1a50.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kusogit.rf.gd/bengal_tiger_telugu_video_songs_free.pdfIn PDF document text
    • https://c788b29d-df2d-4d46-9946-349e8cce89b7.filesusr.com/ugd/a9e086_525d5fc5e6454376987e2714a4b72e5d.pdf?index=trueIn PDF document text
    • http://visunes.myartsonline.com/para_que_sirve_la_moringa_te.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44663c5c-1f81-41e3-b979-65a01e5a6d8d/what_are_the_functions_of_a_security_guard.pdfIn PDF document text
    • http://zilowovuv.atwebpages.com/rosunajademimemiza.pdfIn PDF document text
    • https://7d7e9a41-1eea-4c72-a0b8-c0e3d642de37.filesusr.com/ugd/513cfa_ceea856bd6b746c0ba8babeecd2c1a45.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b600091f-56b2-4d28-ba88-5fee2ae6b6c0/is_it_legal_to_sell_food_from_home_in_california.pdfIn PDF document text
    • http://lugimeviguv.myartsonline.com/felujatofipoxavabajezeleg.pdfIn PDF document text
    • https://a4346b84-4611-49ab-b113-80c9188ca613.filesusr.com/ugd/078c79_b6a6fe856039450584b6e34b5e0778a0.pdf?index=trueIn PDF document text
    • http://viwokapexonilef.rf.gd/povupagewaniwajesusobefo.pdfIn PDF document text
    • http://xasepeza.rf.gd/63375551820.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21a371be-3346-4a21-bdcc-24aaa39bbfc0/portland_1750_psi_pressure_washer_wont_turn_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c93b59f1-bd81-421b-b5d8-2c30627c093d/74558474903.pdfIn PDF document text
    • http://zupupizejegujun.epizy.com/88038993171.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_off0000eb7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7D 5480 bytes
SHA-256: 6e997800484841cbd78081bbb1d3632d563d88c58b9d5eb133fe2110c27fe582
font_01_sfnt_off0000fe19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE19 10028 bytes
SHA-256: a7394b234dbe273ea3edf6fcde1a38f836daf304e68903db7e07c91bec940af7