Malicious PDF — malware analysis report

Static analysis result for SHA-256 09b748d76c6b8e82…

MALICIOUS

PDF

95.1 KB Created: 2021-03-14 04:30:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: dfc31f8da7226cb90fee34572fd86693 SHA-1: 50607b39da2a9447d1d83a20b14af7b51a7e7aa0 SHA-256: 09b748d76c6b8e82c51e671e429daa8791c087e8c6a1014e753dc681b108b7eb
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 0.9992

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://jottigo.ru/123?utm_term=coping+skills+for+depression+worksheet PDF link annotation
    • http://futufudag.iblogger.org/54170495525.pdfIn PDF document text
    • https://balixilime.weebly.com/uploads/1/3/1/3/131398392/lexuwijolixatogag.pdfIn PDF document text
    • https://nijegowililuxis.weebly.com/uploads/1/3/0/7/130739340/jorusas.pdfIn PDF document text
    • http://tusiteguluvora.getenjoyment.net/abb_ability_edcs.pdfIn PDF document text
    • https://kidivine.weebly.com/uploads/1/3/4/5/134576756/d0db3ca6704.pdfIn PDF document text
    • http://zoradiwa.iblogger.org/29475619044.pdfIn PDF document text
    • https://fekamudubop.weebly.com/uploads/1/3/5/3/135325245/vogexuruvipesa_revilir_fudajogavevi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486368/normal_6031d99aaa0c9.pdfIn PDF document text
    • http://vodabutopidaru.getenjoyment.net/tikarepa.pdfIn PDF document text
    • https://mujonuwamuvix.weebly.com/uploads/1/3/1/3/131383921/zegiwumogefa_lariwewar_xevazedugumex_nokipoze.pdfIn PDF document text
    • https://weraxugunelega.weebly.com/uploads/1/3/4/7/134719696/60effd67.pdfIn PDF document text
    • http://wamebejifel.22web.org/fukojefikilatugezufuw.pdfIn PDF document text
    • https://sowimarigakuni.weebly.com/uploads/1/3/4/7/134705136/wobumojar-nasoliziwumoku.pdfIn PDF document text
    • https://gogodelile.weebly.com/uploads/1/3/0/9/130969080/1779322.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416666/normal_60433d5775eb4.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/pilazi/who_is_lucifers_mother_aurora.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/how_to_install_bluetooth_mouse_on_macbook_pro.pdfIn PDF document text
    • http://kelakubusadifi.epizy.com/pl_sql_book_by_steven_feuerstein.pdfIn PDF document text
    • http://bivojeda.atwebpages.com/caperucita_roja_cuento_original_hermanos_grimm.pdfIn PDF document text
    • http://wovuluvoju.onlinewebshop.net/rumonuja.pdfIn PDF document text
    • http://bememikat.onlinewebshop.net/vuxidobijipibuwewurebu.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/11833007080.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/93365330885.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/53995966907.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_off0001374d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1374D 5152 bytes
SHA-256: 7e0f9feefb11d13413d74594dca92c3ed5d08dd72cc52ff0b08cbef4471cdda3
font_01_sfnt_off000148e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148E9 11092 bytes
SHA-256: 3f2c41c12fb7d22d5081aa562dd2bf3cc1c8e3cb6553d23263712a98a198527b

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