Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b11695ff3a8b207…

MALICIOUS

PDF

80.0 KB Created: 2021-03-13 23:43:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: fe79caa7694d0eb200b48044074e35da SHA-1: bf85f09894fcf71187b9285ade93eb8752f7d001 SHA-256: 8b11695ff3a8b2077a7850831b5382fb4f7a020a51c56405cc18336f8d8906ba
126 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs, many pointing to disposable hosting, suggesting it functions as a link farm to distribute malware or phishing content. The presence of a URL related to 'apk download' further supports a lure for potentially unwanted software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://botokaw.ru/wix?keyword=freedom+1.0+8+apk+download PDF link annotation
    • http://kazimibi.getenjoyment.net/xagutimiju.pdfIn PDF document text
    • http://kesuvajeb.scienceontheweb.net/tetiri.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/what_role_does_school_play_in_socialization.pdfIn PDF document text
    • http://fiziwafofekaku.mygamesonline.org/blends_worksheets_for_kindergarten.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/37810475-3340-4010-838d-73c0b81f52f3/sony_dav-tz140_remote_code.pdfIn PDF document text
    • http://solarujarinobo.myartsonline.com/how_to_make_a_simple_drone_at_home.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72c00569-6c14-478b-b463-cdcb047e055d/noduvabupipomov.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/blank_white_t_shirt_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef3e1050-5ac7-4180-b190-7ba487e05f9f/letra_del_himno_nacional_mexicano_en_nahuatl_de_zongolica.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/83860221633.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d569d6ed-232c-4960-b3d9-b44dc8858203/94632766400.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/what_is_a_good_book_for_a_teenage_girl.pdfIn PDF document text
    • http://xabudavadeguvo.myartsonline.com/black_friday_2020_ads.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51b61747-622e-45d9-8ef5-9e33c03f147e/tudopefadafonuwema.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc0a2d69-c64f-4fe3-8b8b-5230ee602dab/tilefewatoju.pdfIn PDF document text
    • http://lusajafimaneru.myartsonline.com/sewafitipib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54401b29-fe2c-4157-8844-7a2d91020fb9/shepherding_the_flock_of_god.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fff1cf1-ac15-44ad-8b03-b48a91c232fc/dupotin.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/lisisi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7980adca-9abb-4086-8357-0397c44171dc/nordictrack_commercial_12.9_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/86635019113.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/gaxajuzizujasezavuserav.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/simplifying_rational_expressions_worksheets_with_answers.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_off0000f982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF982 5460 bytes
SHA-256: 37f986be894ec38752b740ec3fc150d2c44273bbbcb692232cc1dcf7ae79468f
font_01_sfnt_off00010c1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1C 10828 bytes
SHA-256: 1bb6c14c9b40777694742610a76e76d1bd5911c0ff4d1e30bac4b4728b370bc6

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