Malicious PDF — malware analysis report

Static analysis result for SHA-256 975f74bd41e1be51…

MALICIOUS

PDF

136.0 KB Created: 2021-03-24 15:41:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2b7136cec4d6bf0cca6efe9f5e1afd9a SHA-1: 999d5f2f3d7b014c6582a5d3a361743032bbd192 SHA-256: 975f74bd41e1be51d4be3aa298c70c35e6a3ffa47f3ed7585bb3bbc71a97218e
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/award?keyword=flat+belt+drive+calculations+pdf PDF link annotation
    • http://termo-nord.tech/sharp_air_conditioner_parts_malaysiaw3yp6.pdfIn PDF document text
    • http://ottics.ru/montgomery_ward_sewing_machine_model_188_manualbljlg.pdfIn PDF document text
    • http://wofudanupata.22web.org/comparaison_entre_cellule_animale_et_vgtale.pdfIn PDF document text
    • https://rewagafiwexufot.weebly.com/uploads/1/3/1/8/131856649/bijuju-waburaj-mejajukebeb.pdfIn PDF document text
    • https://kiriwalukejogof.weebly.com/uploads/1/3/4/3/134310578/a24378840a6e221.pdfIn PDF document text
    • http://xoxuvajes.mywebcommunity.org/2_digit_subtraction_with_regrouping.pdfIn PDF document text
    • http://dhl-order.info/how_do_i_fix_the_printhead_problem_on_my_hp_officejet_pro_6978hnpx5.pdfIn PDF document text
    • http://circulyarkadigital.xyz/harley_davidson_6.5_boombox_for_sales1men.pdfIn PDF document text
    • https://biwaxosele.weebly.com/uploads/1/3/1/4/131437294/xolowewu.pdfIn PDF document text
    • https://vapaniwagivu.weebly.com/uploads/1/3/4/4/134442769/649cea9c98e.pdfIn PDF document text
    • https://fixizogi.weebly.com/uploads/1/3/5/9/135959929/burakenomapuza.pdfIn PDF document text
    • http://vomamafawib.scienceontheweb.net/69525433069.pdfIn PDF document text
    • http://majikok.mygamesonline.org/how_to_add_shopify_buy_button_to_wix.pdfIn PDF document text
    • http://womizepivilora.sportsontheweb.net/sociologia_de_la_religion.pdfIn PDF document text
    • http://blu-ital.space/4384880895ake79.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://728bf1be-24e3-4891-ba98-fedceca1a503.filesusr.com/ugd/3268c8_03ec67e332a841af9b22de691e773ff1.pdf?index=trueIn PDF document text
    • https://ddb1515c-011f-4d6c-9a6c-b305a2039a85.filesusr.com/ugd/477ac5_d4ca0b541ece46eb8779b8fd1fb0b253.pdf?index=trueIn PDF document text
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_909709a9f5ca440fb313e2e0d348aa31.pdf?index=trueIn PDF document text
    • https://ef2e072a-e8a2-4438-804d-cc750be2e2f6.filesusr.com/ugd/6a22cb_8ed269f3cdb94550a343caf99c257121.pdf?index=trueIn PDF document text
    • https://a72a44ae-2aae-4d6a-a6c4-235301d0a62e.filesusr.com/ugd/57436b_a672dc501eea46ff87df512a44790722.pdf?index=trueIn PDF document text
    • https://917ed8d3-8a9f-4c5c-a3ad-554e533308ad.filesusr.com/ugd/a4e402_044ff87bdcc3470089613795f72ef085.pdf?index=trueIn PDF document text
    • http://lugavatakavupo.rf.gd/23394538098.pdfIn PDF document text
    • https://d0bf7e8b-5449-41c0-93e9-161603c0719f.filesusr.com/ugd/197ed4_f378ed4e4ca14dcc91ef9e1e2512c6b7.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019f5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19F5F 10404 bytes
SHA-256: 6a9ca0ae6266b184c1646d50e8fa0dbf16c8a0f316782ecece75db5fadeb164f
font_01_sfnt_off0001bb76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB76 5304 bytes
SHA-256: cded2f5eb28d586e79545ff127a123ccbef1680e10e57f9adcce81edf3605042
font_02_sfnt_off0001cd92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CD92 12980 bytes
SHA-256: ea366f89ed457ae3de800e139ed57cea9cae4e52e78ac199bb83b41c242e7d44
font_03_sfnt_off0001f9b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F9B6 16364 bytes
SHA-256: 42a852920439301659fe87aedce3f0b133c3b8d83fb0000d83e0e0a9cd333cf1