Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a36bb25554391e0…

MALICIOUS

PDF

82.0 KB Created: 2021-03-19 23:43:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: e63f03ef395252f69c754d734556a35d SHA-1: 6bd533161df9b605f9f94f2c2f12391c968fea68 SHA-256: 8a36bb25554391e02968022609785c3d6684a3c40f6d4f85a7c8d7866bbe53f9
66 Risk Score

Malware Insights

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

The PDF contains numerous external links disguised as service manual downloads, a common lure for phishing or malware distribution. The ML classifier strongly indicated maliciousness, and the presence of many links on disposable hosting further supports this. No scripts were extracted, but the document's structure and embedded URIs suggest an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://bologen.ru/award?keyword=toyota+corolla+2020+service+manual+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367632/normal_603a464ff1b40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450428/normal_602222cecf247.pdfIn PDF document text
    • http://forecast.bet/59123228677a3k2q.pdfIn PDF document text
    • http://hangookoil.ru/sovazuvitamajinurack219.pdfIn PDF document text
    • http://fringigejy.site/92332388307aij56.pdfIn PDF document text
    • http://golden-bridge.pro/new_tags_in_html5_with_examplesdkytx.pdfIn PDF document text
    • http://amin-ukraine.net/suwobikaxemv5c2.pdfIn PDF document text
    • http://milesatel.mygamesonline.org/the_accelerated_learning_handbook_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471514/normal_600528c4df2fb.pdfIn PDF document text
    • http://technodom11.com/how_to_reset_electrolux_refrigeratort52fz.pdfIn PDF document text
    • http://women-ita.space/jezavigovasugug9chzx.pdfIn PDF document text
    • http://blancop.xyz/crysis_3_alpha_ceph_bug_fix_crack7f2lx.pdfIn PDF document text
    • http://samafutanub.mypressonline.com/aromatherapy_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486745/normal_602ece901a4dc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sudevejerifu/bed_wars_game_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e5eaf11-c6b5-4fc8-a4b5-a682f158bc41/jogusibom.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/johan_galtung_teora_del_conflicto_libro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/272c36a9-6b05-4d8c-b3ee-7c92630ebe72/kokasetedog.pdfIn PDF document text
    • http://dufojamimusim.atwebpages.com/livro_os_argonautas_do_pacfico_ocidental.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/198b8009-d9fc-4386-bca0-362467717eb0/bose_sounddock_10_price_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/65507190358.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_off000102ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BA 5684 bytes
SHA-256: 287f9f7e57781495e17782d28101b20a3987864c63e0ffd4a36f0280912a99a5
font_01_sfnt_off00011605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11605 10688 bytes
SHA-256: 9f9838e747e4edc633dfec386341a22651c125583c1487cc550bb969e959388b

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