Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a4052caf3ae88f5…

MALICIOUS

PDF

74.1 KB Created: 2021-03-11 11:50:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e0533ec5b9128ea0c04784285066843b SHA-1: bcb423a707c3b712b6e60601df1c88f13bb21a5e SHA-256: 9a4052caf3ae88f5a9a2c007a91a96dd4b68f79fc970d8299d6fa700874cf937
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document body, though heavily obfuscated, appears to be a lure related to nutrition information, likely to trick users into clicking embedded links. The numerous external URLs, many hosted on disposable domains, suggest a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=slug+and+lettuce+nutrition+information PDF link annotation
    • https://cdn.sqhk.co/fezusife/bljbJjj/89813927219.pdfIn PDF document text
    • http://kebotup.66ghz.com/29696567036.pdfIn PDF document text
    • https://cdn.sqhk.co/vixawutozama/avVLjiL/81561013433.pdfIn PDF document text
    • http://sibogufurab.medianewsonline.com/35795753618.pdfIn PDF document text
    • http://paripamivawe.iblogger.org/denamorujavonovezegem.pdfIn PDF document text
    • http://xubanapirobula.mypressonline.com/formato_minuta_de_reunion_en_word.pdfIn PDF document text
    • http://tixaman.scienceontheweb.net/how_to_change_jpg_to_on_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/genamudazunu/jhchcjh/vikumotinugivugizufafivap.pdfIn PDF document text
    • http://zomaragexavope.sportsontheweb.net/30748627648.pdfIn PDF document text
    • https://cdn.sqhk.co/fopikudapom/M6hhgcM/jawag.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutowede/ZF6jaq6/he_doesn_t_love_me_anymore_songs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cfff6b0e-fc0f-4d9c-a983-c0e60c8b2bfd.filesusr.com/ugd/c637e3_a327327eaac04485aa506cd8d37eafd1.pdf?index=trueIn PDF document text
    • https://34ea5197-a9e9-4ba5-99bb-a7dd7aeba98b.filesusr.com/ugd/234f58_898bc1876f174ec28c07fd9923ca4aa7.pdf?index=trueIn PDF document text
    • https://d25e5d79-f3dc-43ab-8538-58f2f4730235.filesusr.com/ugd/898300_cd8dbb6dc8ad4963b51303da53b70d75.pdf?index=trueIn PDF document text
    • http://kodexogezetegir.epizy.com/all_cg_song_new.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/horde_leveling_guide_3._3._5_warmane.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/4510374209.pdfIn PDF document text
    • https://b5b764bc-4fc6-48d7-9a4b-423a4d05f225.filesusr.com/ugd/3f2390_bf569373910448578b0a6f09cd9e30d3.pdf?index=trueIn PDF document text
    • https://0f8fedcd-12c0-4678-86f8-e2bff7269121.filesusr.com/ugd/70e7d4_1687fcb0f7a0448181dcf79677e6bd7e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/bharti_axa_2_wheeler_insurance_claim_form.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_off0000e55c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE55C 5268 bytes
SHA-256: 2f6fa2b68b69718686550a086356d2248322491b99d91420d65c04c37f289eea
font_01_sfnt_off0000f72f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF72F 10668 bytes
SHA-256: 54ee4918328abe28f5ade9a451a44eb7d28cf101e10a516cbcc68a2334e9a711

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