Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdd5e7fb4179fb85…

MALICIOUS

PDF

86.3 KB Created: 2021-03-30 20:11:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6dff25657ed0339c8eb5f8a8e2e46988 SHA-1: 729a65e146fb9ccfec8080d67f6f781e9877e876 SHA-256: bdd5e7fb4179fb85bb57407c62ed4145fc67bccc26f726e34073645983805b60
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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 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.
  • 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://maypoin.ru/award?keyword=beehive+book+of+9th+class+pdf+solutions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417413/normal_6056c0fc839b0.pdfIn PDF document text
    • http://manamuketamas.22web.org/domino_s_pizza_menu_uk.pdfIn PDF document text
    • http://midunetojonawiw.mywebcommunity.org/antibiotic_spectrum_chart.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418984/normal_5fe18336a2579.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421350/normal_5ff9ee5175356.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409114/normal_5fc7b53f8bd00.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jijumupade/paneseparuxibizunujidozo.pdfIn PDF document text
    • https://76c9fb28-c10e-4950-85be-37de24a2ede8.filesusr.com/ugd/fa32a6_67514ca09ae5494ba14623ca6681465f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bupijila/cisco_air-lap1142n-e-k9_password_recovery.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/lejozupisipisefesaw.pdfIn PDF document text
    • https://3d7c42e8-cad9-4196-8f3c-0f210fd97588.filesusr.com/ugd/1b7c00_52d8d0e297074000b3da5e773c6ef2a6.pdf?index=trueIn PDF document text
    • https://584abdf6-e408-48d3-a53c-4313a8f82471.filesusr.com/ugd/18ee90_9cd8a0be56aa493a9453853c54d5fb40.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/65821772327.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/20_poemas_de_amor_y_una_cancion_desesperada_analisis_por_poemas.pdfIn PDF document text
    • http://lazuletezofik.onlinewebshop.net/buku_problem_solving_101.pdfIn PDF document text
    • http://bafilus.epizy.com/37864119932.pdfIn PDF document text
    • https://0eb00d84-361a-45dc-b346-1af5c8eb785c.filesusr.com/ugd/d79848_4efc9f7602474f47b545873875fb3068.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/patilawasu/bufelemepob.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/flight_of_ideas_vs_loosening_of_associations.pdfIn PDF document text
    • https://6bb2b61b-82bf-473b-8365-63ddb02ddbdd.filesusr.com/ugd/d55797_fe5a9cbcc8094d92b23600e7770df2d7.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_off00011507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11507 5616 bytes
SHA-256: 6eaa4ef7c07c06be88d2e8a5b2cf843233fe92ed477d77234d8d746f8c659847
font_01_sfnt_off00012833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12833 10500 bytes
SHA-256: 43978db312455a6cdac7d064bd3f2ca62fab6e2682560774a6b86888cb27c074

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