Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a8a1edf17bbd40c…

MALICIOUS

PDF

83.1 KB Created: 2021-04-26 19:02:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 198a3775547b80ad0b43e55855337300 SHA-1: 33468178a5f9940f1f8dc91606660c3bbb887f18 SHA-256: 6a8a1edf17bbd40cf18c3f5202861388fc9c3e38c7148c86126ccc962328960d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged as a link farm on disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious activity.

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://midufefew.ru/strik?utm_term=what+is+life+best+quotes PDF link annotation
    • https://jumugegapu.weebly.com/uploads/1/3/0/8/130814907/8251663.pdfIn PDF document text
    • http://hisgohar.site/6102288491xifdm.pdfIn PDF document text
    • http://blaugrana.ru/monster_arena_checklistr5pl3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419851/normal_5fc7f3266be45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383446/normal_6029571e5b102.pdfIn PDF document text
    • http://cosmicgig.com/diturufurawabomom5wo7e.pdfIn PDF document text
    • https://cdn.sqhk.co/nugopanage/3FiiE0m/logic_pro_x_clip_launcher.pdfIn PDF document text
    • https://cdn.sqhk.co/sevimifogu/S6heIdq/homeserve_plc_annual_report_2017.pdfIn PDF document text
    • https://pozusope.weebly.com/uploads/1/3/1/4/131453674/gofeziroburaji_fasiwevu_wasefolasik.pdfIn PDF document text
    • http://wide-do.top/tomaxinenuduzalobejakak1u5.pdfIn PDF document text
    • http://regsenatvumen.website/rivabuzikudotafarowapanoqlmqg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486566/normal_601a0f9134416.pdfIn PDF document text
    • https://dufibivi.weebly.com/uploads/1/3/5/3/135346242/9175363.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473640/normal_6052cbdd54582.pdfIn PDF document text
    • https://xijananok.weebly.com/uploads/1/3/0/7/130740199/xuxuxoja_zepili.pdfIn PDF document text
    • https://cdn.sqhk.co/zenegiwowi/ijdviha/monster_girl_maker_2_for_pc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/bogijexu/bsc_maths_books_for_free_in.pdfIn PDF document text
    • http://birotizedu.epizy.com/what_is_law_according_to_blacks_law_dictionary.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/bodybuilding_meal_plan_template_excel.pdfIn PDF document text
    • http://vulebodifoguvar.epizy.com/tricks_to_solve_boat_and_stream_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/31641523717.pdfIn PDF document text
    • http://rojiferavu.epizy.com/posesor.pdfIn PDF document text
    • http://xukomaro.epizy.com/9214088040.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAC 4812 bytes
SHA-256: 1658a1cb101379fde598e3f4d5ccf3e73dca63cced1c9361a02a02da7793f513
font_01_sfnt_off00010c22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C22 10756 bytes
SHA-256: 677be2803e8ddfb4d9175433ecab48c20348e190716bfc5ba2d6eedce739d85b
font_02_sfnt_off000130ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130BA 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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