Malicious PDF — malware analysis report

Static analysis result for SHA-256 39ffcacf6175590e…

MALICIOUS

PDF

75.0 KB Created: 2021-03-20 20:23:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a8cf6f8cf993ed4b7f27e70ee31d35f5 SHA-1: dc945ee14bea95370810a31da88dd18eea032e63 SHA-256: 39ffcacf6175590e1a06d70b36505388b1cf009709fa5432b956daee5717a1f3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to external domains, many of which are hosted on disposable or suspicious domains, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated, but the presence of external URIs and the overall heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/award?keyword=pdf+asperger+s+syndrome PDF link annotation
    • http://bejisosubonito.sportsontheweb.net/3789787375.pdfIn PDF document text
    • http://itasda.online/choice_of_games_vampire_the_masquerade6fsu3.pdfIn PDF document text
    • http://lamovingcompany.com/sofatoniseji72dgx.pdfIn PDF document text
    • https://cdn.sqhk.co/bupewazadufa/ehchhjf/kanto_yu2_vs_yu4.pdfIn PDF document text
    • http://simcars.ru/mimidizadofiv7f7n.pdfIn PDF document text
    • http://csxmoney.info/getogiwexinelefixesoxojib6tw.pdfIn PDF document text
    • https://cdn.sqhk.co/livaxipovage/VRnGjbv/directv_customer_service_number_hours.pdfIn PDF document text
    • http://libertinemodels.com/apa_bibliography_format_multiple_authorsiyy10.pdfIn PDF document text
    • http://midunetojonawiw.mywebcommunity.org/37439477451.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408873/normal_60053b2417755.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387703/normal_5fe239e544610.pdfIn PDF document text
    • https://cdn.sqhk.co/vilosezuj/gje3hhm/goat_simulator_waste_of_space_free_download_android.pdfIn PDF document text
    • http://tamogulaganero.scienceontheweb.net/an_etymological_dictionary_of_the_latin_language.pdfIn PDF document text
    • http://phulop.store/how_many_homeless_live_in_los_angelesrbflp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419194/normal_6031d043c0f19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466153/normal_5fe63eefa25da.pdfIn PDF document text
    • http://banquepopulaire-fr.org/159217853550o0x8.pdfIn PDF document text
    • http://thecet.xyz/how_to_sync_comcast_remote_with_lg_tvmca3g.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/3049a2b6-8054-4e56-bb32-bd21cdba80bf/10892201131.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60b4e127-cb91-4eae-8341-a40bddd2d6ec/tuzipitopekomotopaxetis.pdfIn PDF document text
    • http://fufudaloxola.onlinewebshop.net/61273633227.pdfIn PDF document text
    • http://kakasis.onlinewebshop.net/42122111429.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_off0000ead5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD5 5432 bytes
SHA-256: 71e30708444c56aa01aae56ad384dfc95f6752b59ceca7a61822c8a2aa38a5c3
font_01_sfnt_off0000fd48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD48 9864 bytes
SHA-256: cb0d9933fc1be9549c9746b349db4258549debb695cfdc4d91c95c34aadf599a

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