Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9e46bde7292c274…

MALICIOUS

PDF

86.2 KB Created: 2021-03-20 18:13:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7205911d704876e4293f9660a2614aed SHA-1: a9fe434480fc9c104518d5f0e7145a6010634d2f SHA-256: c9e46bde7292c2740827712fa28420c4f60c2bb9f2c9ba8815c21728ba2869ec
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to disposable domains, indicative of a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were directly extracted, the PDF structure and numerous URLs are consistent with a phishing lure or a gateway to other malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://ponafet.ru/wix?keyword=false+memory+syndrome+foundation PDF link annotation
    • http://lnstagram-verifedbadge.com/65185322963gs55u.pdfIn PDF document text
    • http://changepass.online/wexabukorosasowasi1grpp.pdfIn PDF document text
    • http://topchambre.xyz/john_maxwell_books_2020o35km.pdfIn PDF document text
    • https://cdn.sqhk.co/tememagitapo/Jc9Yidm/kodiak_island_borough_jobs.pdfIn PDF document text
    • https://cdn.sqhk.co/wozovege/hhjFPgi/sitazuf.pdfIn PDF document text
    • http://iclod.tech/bergeys_manual_of_systematic_bacteriology_volume_5_the_actinobacteriaiyph9.pdfIn PDF document text
    • https://cdn.sqhk.co/nawinirezuj/feqjjgf/guvutuzaze.pdfIn PDF document text
    • http://zuzutefiro.22web.org/vozopumim.pdfIn PDF document text
    • https://cdn.sqhk.co/sunawopi/ejhhji7/kong_extreme_goodie_bone_dog_toy.pdfIn PDF document text
    • https://cdn.sqhk.co/buwuvibija/jdhcjh8/nojawulifimosid.pdfIn PDF document text
    • https://cdn.sqhk.co/mejiwimuza/14jhgjd/cpl_live_cricket_match_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/wofikubid/jcijhfq/kowinusujet.pdfIn PDF document text
    • https://cdn.sqhk.co/tawavumazo/y1gcEhf/nafimixafubos.pdfIn PDF document text
    • http://formverifiedbadge.com/tipos_de_sistemas_operativos_servidor1ngoz.pdfIn PDF document text
    • http://ekbsite.ru/92241869629dggsy.pdfIn PDF document text
    • http://pe50off.info/how_much_to_replace_a_stove_topeimyl.pdfIn PDF document text
    • https://cdn.sqhk.co/neseleko/aiUl1if/real_driving_simulator_pc_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://bipufapo.rf.gd/what_are_hard_leadership_skills.pdfIn PDF document text
    • http://xexasuwoxomiba.rf.gd/google_chrome_for_windows_10_espaol.pdfIn PDF document text
    • https://4779f2f8-a33e-4327-9c78-21ee0bcf4620.filesusr.com/ugd/31bf02_327ad36ec52c4d07be3645a370652af4.pdf?index=trueIn PDF document text
    • https://45b0b119-5f8c-43e7-b437-4e12d17c1c81.filesusr.com/ugd/3826db_f7a543d7873a4691aeaa07a65a15964a.pdf?index=trueIn PDF document text
    • https://24451074-f53b-4065-993c-779ba3957988.filesusr.com/ugd/0ae25f_ef76e3d8d63d4ba3940f4b75de4a9f54.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106DA 4992 bytes
SHA-256: 6dba95772fbedbc130f6a44d2a5a649f23bf853543514e2c1511e45ea6806734
font_01_sfnt_off000117be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117BE 11040 bytes
SHA-256: 458d1bac326ec2715ab37557891cc0bb870bf0f20a4b6eb2803094d2f05f29ac
font_02_sfnt_off00013d1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D1A 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176