Malicious PDF — malware analysis report

Static analysis result for SHA-256 78cb497718d96fae…

MALICIOUS

PDF

89.9 KB Created: 2021-04-03 08:46:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d8d6c64d6d1973a3d2c059ebbdf72ebe SHA-1: 11fab8a8e64eefb7c51c1bdf0a437e027625d67f SHA-256: 78cb497718d96fae970ee1cc033d1fa1d78c81d38848eec4beeea6fc7345e3ba
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/strik?utm_term=journey+to+the+west+2+full+movie+in+hindi+watch+online+free PDF link annotation
    • http://doordash.fun/defender_90_for_sale_ukhnn1g.pdfIn PDF document text
    • http://fapseo.ru/vamutebajutuvalupunes4twsy.pdfIn PDF document text
    • https://mebogizudoredo.weebly.com/uploads/1/3/4/4/134472702/jogefip.pdfIn PDF document text
    • http://fridgeservice.ru/20848998563r4jtp.pdfIn PDF document text
    • http://detonic-ro.website/does_immanuel_kant_believe_in_goduqj9x.pdfIn PDF document text
    • https://xokotenesuku.weebly.com/uploads/1/3/1/4/131438709/6e97a8.pdfIn PDF document text
    • http://musofiron.ru/mutepirejidurewekipaxepvzh7x.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/widuxade/vetasexub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/321dfe9e-a9ce-4426-830b-c3432eaf3210/reading_comprehension_definition_of_terms.pdfIn PDF document text
    • https://0dd4521b-3e41-4083-9bcc-807cce03ae78.filesusr.com/ugd/cfe2e9_3b19e8b3bf6545109097c4bea95458fc.pdf?index=trueIn PDF document text
    • https://fb413987-6e77-4bf1-aaa6-e97eb550fbee.filesusr.com/ugd/108936_df75332acda1412798a914069d712730.pdf?index=trueIn PDF document text
    • https://d1159ab4-cbf5-42eb-897b-83a5e94cd7da.filesusr.com/ugd/536122_7832e863b3a549399869d6650cc0f7d2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fadobirak/80769101071.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d15cd3f-06f8-43a2-88db-e418ce65c40b/can_you_paper_trade_on_thinkorswim.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/lucent_junior_english_translation_book_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/invitation_for_birthday_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/63461467946.pdfIn PDF document text
    • https://29c5b005-6627-40e3-9da1-9f9d3dbc34dc.filesusr.com/ugd/7ad284_32f7c8d0c1c345fcaa462217787fd069.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_off00012241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12241 5636 bytes
SHA-256: 557eb1a72d8980203fc48d36d549ecae977b251216a7589fe488d68aa1598589
font_01_sfnt_off00013562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13562 10772 bytes
SHA-256: e432978a7659d01f9ef206dfcdf30f4c33dd5d735f7373e1e2171d18e45e09ba

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