Malicious PDF — malware analysis report

Static analysis result for SHA-256 098b8414472ddf0a…

MALICIOUS

PDF

69.3 KB Created: 2021-04-21 23:53:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: db9e23bae1ba67a11880de4652aee295 SHA-1: bd1069526393bcbcccb698ba7028df7008f33c92 SHA-256: 098b8414472ddf0afc571fa8a99f4039da5650fd25400b010b3f71ca0b2d2663
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs, one of which is associated with a package delivery scam. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or credential harvesting. No scripts were extracted, but the presence of external links suggests the document's primary purpose is to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=why+was+my+package+returned+to+sender+dhl PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447086/normal_6060e53f5f913.pdfIn PDF document text
    • http://busibear.com/dsi_2019_conference_scheduleted00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459059/normal_600f4c2acba37.pdfIn PDF document text
    • http://dominis.xyz/78593104538i3skh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371523/normal_601b35fd74372.pdfIn PDF document text
    • http://xagigusutop.iblogger.org/tony_robbins_personal_power_ii.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444877/normal_605110665da6d.pdfIn PDF document text
    • http://stroiline74.ru/juego_caras_y_gestos_para_imprimir1gi60.pdfIn PDF document text
    • http://blablablacar.online/how_to_analyse_structure_of_a_textbev9v.pdfIn PDF document text
    • http://namelesssouth.xyz/what_philosophy_of_life_does_the_poem_a_photograph_reflect7t97x.pdfIn PDF document text
    • http://artdebug.site/samurai_vs_zombies_defense_2_hack_ioswc6cc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://da54c32a-99c7-4590-8520-800dd2d1cae3.filesusr.com/ugd/7973d2_bef68cd83daa47409f6ba4b90b0eecfd.pdf?index=trueIn PDF document text
    • https://1f53f175-067f-4140-b001-f66bebc9855b.filesusr.com/ugd/c711d8_771986cde14c4ac58447a183c66e3149.pdf?index=trueIn PDF document text
    • http://lozunina.epizy.com/simple_and_compound_interest_annuities.pdfIn PDF document text
    • https://5ce19dfa-329f-495d-88d1-e1e7834d9072.filesusr.com/ugd/d902bb_54131501a535455a90b889f7755acc2b.pdf?index=trueIn PDF document text
    • http://robabunegulawi.rf.gd/fozisozurebegutezapimexo.pdfIn PDF document text
    • https://59e5a08b-0d8d-455f-a3a7-35a3b781ab3e.filesusr.com/ugd/784815_1bf533661f0843888fabd2c97fc6f62d.pdf?index=trueIn PDF document text
    • https://d896c2b7-539c-4146-aa8a-b39d26e096d8.filesusr.com/ugd/a98ecc_01fb48700800445d98caff0aaca3395b.pdf?index=trueIn PDF document text
    • https://45f0f727-c607-4398-b3b7-8b42e23b21b2.filesusr.com/ugd/0a84ca_d6927f3520e1486daa53910df412204d.pdf?index=trueIn PDF document text
    • http://podisibasozo.rf.gd/87597942227.pdfIn PDF document text
    • http://lepigofogirevog.epizy.com/astm_d638_free_download.pdfIn PDF document text
    • https://9f53eded-325d-4e02-8430-7c09bd872488.filesusr.com/ugd/e04405_54b91edca8334a9eb072635bd6603c15.pdf?index=trueIn PDF document text
    • https://1dab3517-3db0-43ff-9fd6-b65b51f65b60.filesusr.com/ugd/565485_f808891bd06540898af71285c860359b.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE7 5756 bytes
SHA-256: 0ebe65dd878c74e3c74e2ed6d95b5895d4a4a4f5ee5eb2c17c603c1a4ec4707a
font_01_sfnt_off0000e36e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36E 10056 bytes
SHA-256: e98040eef7ad92fb1f09ece24ddd62dce0af80361004cb607b2eae5383252643