Malicious PDF — malware analysis report

Static analysis result for SHA-256 b15cf8b6f044ff8c…

MALICIOUS

PDF

94.3 KB Created: 2021-02-26 16:17:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 372b2ebaaed3689dd9617ae863c2fbb2 SHA-1: d776c77eab9adb831169ce48a13fb1f6701cdf7a SHA-256: b15cf8b6f044ff8c39daea8f5e353a7c92eb7fb7a303b395e3fda6c73d7bfaa7
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are indicative of a phishing or scam campaign. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically flags the document as a link farm on disposable hosting, suggesting an attempt to redirect users to malicious sites. The ML_NYX_PDF_MALICIOUS and ClamAV detections confirm the malicious nature of the file, likely due to its phishing or trojan characteristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7333

Heuristics 4

  • 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
  • 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=which+dyson+big+ball+is+best PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408324/normal_5fecc6576510e.pdfIn PDF document text
    • http://datab.vip/text_evidence_reading_passagesee4xx.pdfIn PDF document text
    • http://repair-foto.ru/ge_electric_steam_clean_oven_instructionsxk7z4.pdfIn PDF document text
    • http://wiinorama.fun/libro_para_aprender_japones_desde_cerof4ac4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484356/normal_5fce5bef89819.pdfIn PDF document text
    • http://raifaisentapp.online/acrobat_reader_editor_online25gl5.pdfIn PDF document text
    • https://xizevidunofi.weebly.com/uploads/1/3/4/3/134321119/peluvufazibulijo.pdfIn PDF document text
    • http://ita-fitness.fun/22236623997rj025.pdfIn PDF document text
    • https://guxesawaxogego.weebly.com/uploads/1/3/4/3/134314991/bogot.pdfIn PDF document text
    • http://jumpfs.space/vudebosegafopqkyek.pdfIn PDF document text
    • http://furafofuvobomu.22web.org/marathi_bhakti_video_song_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419412/normal_5fce2b50a5af8.pdfIn PDF document text
    • https://xubawiki.weebly.com/uploads/1/3/1/1/131163512/0f0e52bb5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370268/normal_5fdbc2814fc8b.pdfIn PDF document text
    • http://goodxday.xyz/setatux2h65.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tiwufuwivuvuf.epizy.com/96515265293.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/aiims_pg_2019_application_form_login.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13192 5148 bytes
SHA-256: 684f7f4610810099c8180f99621ac4ab20754bd317a66665cbf065d3e8571c66
font_01_sfnt_off00014313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14313 10488 bytes
SHA-256: fce4102f0e91e468777230b330a6de1327442f5b98ad67ea68c2065ec84a1ff2
font_02_sfnt_off000166f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166F5 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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