Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c5a50c30e72128a…

MALICIOUS

PDF

71.6 KB Created: 2021-02-18 13:11:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 391f304c8b802c39af7cc1e5f088d632 SHA-1: 224f52761c2c077be4a76edb405f4b2ccb601e24 SHA-256: 3c5a50c30e72128abc4a5a7f33ac6b21b931a6e1add2c03fd79c9e5e5d207adc
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 0.9997

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 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://druttle.ru/aws?utm_term=the+secret+life+of+the+american+teenager+full+episodes+season+2 PDF link annotation
    • http://nikupajosokob.22web.org/competition_music_power_sound_mp4.pdfIn PDF document text
    • http://getallcreditscores.info/chalte_chalte_song_video_free4o7p8.pdfIn PDF document text
    • https://bobilemako.weebly.com/uploads/1/3/4/7/134733435/9f19d3e.pdfIn PDF document text
    • http://finansi-7.online/kick_2_ki_heroinerw3jc.pdfIn PDF document text
    • https://tipoxuxol.weebly.com/uploads/1/3/0/8/130814923/e04664cf2295878.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459921/normal_6005f6bb93e87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380078/normal_5fdc3d5ce08d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475215/normal_5fefef63b810e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405687/normal_5fe8222452f41.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://folizel.epizy.com/primark_brushed_cotton_fitted_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/sobizigixarowugutuk.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/nisutolovetowiwefif.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/trunk_party_invitations_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/chakra_guided_meditation_10_minutes.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_off0000db30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB30 5652 bytes
SHA-256: cba32a72927b28f3c4033d0851aaad02f42aaaf96c50199a45ddf60092c7fbca
font_01_sfnt_off0000ee3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3C 10228 bytes
SHA-256: f25a69c7e01ed364f8490141bbdfb8ac6b601a233ad37b242e1e81800dff0689

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