Malicious PDF — malware analysis report

Static analysis result for SHA-256 feba013ad124caa4…

MALICIOUS

PDF

76.3 KB Created: 2021-03-24 12:37:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e87d95979996933a33008688fffb1aad SHA-1: 47dc30803e0f2ec819bbf10cba994f79d7bd6b07 SHA-256: feba013ad124caa492c2a25834004d0aaebf9ea88cd064a51797be1cefaabadf
126 Risk Score

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 0.9511

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://fokemale.ru/award?keyword=android+studio+full+tutorial+pdf+download PDF link annotation
    • https://sagerogokijisoj.weebly.com/uploads/1/3/4/6/134601402/db817129c.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/bhjvggl/escape_the_prison_game_answers.pdfIn PDF document text
    • http://fastgetme.online/lawev1ekib.pdfIn PDF document text
    • https://cdn.sqhk.co/mezigiduze/gihaFgj/sazarimoji.pdfIn PDF document text
    • http://liwexun.mywebcommunity.org/batching_plant_of_concrete.pdfIn PDF document text
    • http://jubigale.scienceontheweb.net/mechanical_engineering_objective_book_rs_khurmi.pdfIn PDF document text
    • http://snail-case.store/gaggia_classic_coffee_machine_usedrdyrb.pdfIn PDF document text
    • http://newyearshop.site/63567041214doabn.pdfIn PDF document text
    • https://tinubuwetoka.weebly.com/uploads/1/3/5/3/135325034/femanamapigofaw.pdfIn PDF document text
    • http://gradstroy.su/tekin_rx8_manualabset.pdfIn PDF document text
    • http://madamzero.com/olympus_om_1_user_manual3l5i9.pdfIn PDF document text
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/8999223.pdfIn PDF document text
    • http://mofonuf.medianewsonline.com/69109499753.pdfIn PDF document text
    • https://tedajurilazunu.weebly.com/uploads/1/3/0/7/130739962/a3fe677f347.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/tujeviwakirawu/53878719545.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/android_change_action_bar_menu_icon.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/5608017598.pdfIn PDF document text
    • https://e5447efa-8854-4d04-834e-f0bbd7438c8b.filesusr.com/ugd/ac612b_6a65290834ef47118493f33f935038fa.pdf?index=trueIn PDF document text
    • https://67dec473-0a9c-497c-80b1-62a4c84c5046.filesusr.com/ugd/0aab01_3f49ae3c9fbe436bb633cc3e57231361.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zonebon/79817615611.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/nice_guidelines_febrile_child_traffic_light.pdfIn PDF document text
    • http://guwaxilajoxeza.onlinewebshop.net/13996889206.pdfIn 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_off0000f866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF866 5116 bytes
SHA-256: f51a15f4954983a5702e62f12bd055a79875a90780b362974e61a469fff39e5c
font_01_sfnt_off000109f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F0 10584 bytes
SHA-256: 9d895c76fe21c7cb3df80c7aa656d584d2e76a125c40c3563df896fd0e2290f0

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