Malicious PDF — malware analysis report

Static analysis result for SHA-256 852d4c80d6363efb…

MALICIOUS

PDF

98.4 KB Created: 2021-03-27 11:09:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 79d6abb86597e6235a5a3b0adbe3f018 SHA-1: 4d7218fa2dd716fb6397f09c766c3f5ddb770437 SHA-256: 852d4c80d6363efb0f0b1186b8b7bf760371a7daf4c0b8a95bc37f8722b1c98c
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains embedded URLs, with one pointing to 'maypoin.ru', which is likely part of the lure to a malicious site. The document body, though heavily obfuscated, suggests a theme related to historical administration timelines, which is a common pretext for phishing attacks.

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://maypoin.ru/award?keyword=antecedentes+historicos+de+la+administracion+linea+del+tiempo+pdf PDF link annotation
    • https://cdn.sqhk.co/gogerazina/g68jgjf/resub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371005/normal_5fc9936697b4f.pdfIn PDF document text
    • http://povulofi.mywebcommunity.org/calligraphy_a_complete_guide.pdfIn PDF document text
    • http://meetraisins.club/the_true_story_of_the_three_little_pigs_printable4nqmp.pdfIn PDF document text
    • http://dewisazovuvoxi.mywebcommunity.org/bending_moment.pdfIn PDF document text
    • http://rotirir.mypressonline.com/ahead_of_the_curve_book.pdfIn PDF document text
    • http://usesucre.pro/952858532833m6d0.pdfIn PDF document text
    • http://vevovifox.scienceontheweb.net/the_celebrated_jumping_frog_of_calaveras_county_worksheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491925/normal_600b3956d0b12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384308/normal_602c1d5036d6c.pdfIn PDF document text
    • http://fruit-citrus.space/punjabi_movie_ardaas_karaan_in_hdk05ps.pdfIn PDF document text
    • https://cdn.sqhk.co/suwefememe/3hDhhhd/98785771807.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465277/normal_60532514a228b.pdfIn PDF document text
    • http://zisapawiwako.mypressonline.com/macro_and_micro_structure_of_the_skeletal_muscle.pdfIn PDF document text
    • http://gtmedis.com/cascading_style_sheets_properties_list49vx7.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/c19835bf-7b71-462f-b38f-d1e7c227b14e/63217564359.pdfIn PDF document text
    • http://kegigija.atwebpages.com/dakes_annotated_reference_bible_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/289a74bf-27b0-4349-bde1-0a9125163a70/what_companies_are_listed_on_the_london_stock_exchange.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4735ae27-7995-449b-85cf-91c805c0d6d3/don_juan_demarco_soundtrack.pdfIn PDF document text
    • http://bekusisit.atwebpages.com/husky_air_compressor_home_depot_canada.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_off000141c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141C5 5384 bytes
SHA-256: fa26ae77246e0b4d2992a6b343ad426877ccaa1dd79ed181bf4ea382fafc6f6f
font_01_sfnt_off000153e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153E9 11568 bytes
SHA-256: 473b63249583766c25ffcf7fc29cd290ccd9a61d867944be66b0051efaf2b496

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