Malicious PDF — malware analysis report

Static analysis result for SHA-256 36f86a007fbc37df…

MALICIOUS

PDF

76.7 KB Created: 2021-04-06 22:25:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ccfa716c54e0b72d8a8abf219fb3b21c SHA-1: d2f2879b62febe6a13fb5143d29534b7338621f9 SHA-256: 36f86a007fbc37dfacb34dd8ad4a24a2e905f82f5eed6d940ee3787e6d506e9f
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically phishing. While no scripts were directly extracted, the presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign.

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://lozipotod.ru/strik?utm_term=integral+de+sen%255E2+x+cos%255E3x+dx PDF link annotation
    • https://cdn.sqhk.co/nokotadi/thfhhai/machine_gun_kelly_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/xororofomed/fQZOTif/43813472310.pdfIn PDF document text
    • https://webijizili.weebly.com/uploads/1/3/4/6/134609257/8586890.pdfIn PDF document text
    • https://jitegolugitu.weebly.com/uploads/1/3/4/6/134643776/1437753.pdfIn PDF document text
    • https://fejenugid.weebly.com/uploads/1/3/4/0/134016750/2806850.pdfIn PDF document text
    • https://cdn.sqhk.co/vufuvevu/WieWchH/67936481255.pdfIn PDF document text
    • https://cdn.sqhk.co/jinubodilev/djguieS/kofikupekinu.pdfIn PDF document text
    • https://guxolufesa.weebly.com/uploads/1/3/4/4/134468064/futidukaguve-rodaz-pisadarep-sepogasebenewat.pdfIn PDF document text
    • https://cdn.sqhk.co/vujositet/aLYFfja/wipevudivut.pdfIn PDF document text
    • https://mitewowepo.weebly.com/uploads/1/3/0/8/130813710/2c6d1ba2.pdfIn PDF document text
    • https://jinoranimewaxop.weebly.com/uploads/1/3/4/5/134528513/pewatep-wojupusetov-sovudegum.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/rewepalazamiso/95561054814.pdfIn PDF document text
    • https://e216d865-ddc7-438b-99b2-64609380b1bb.filesusr.com/ugd/7ae8b3_2bf2e1bb4a3a4b138d3aa9af1e909e9a.pdf?index=trueIn PDF document text
    • https://5ee0d2ad-6486-47ce-ab7d-0e7b2bae4193.filesusr.com/ugd/bc0d1e_a73d3cddf6214a2f91dfe4863fffff6d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tosego/aashiqui_2_songs_mp4_female_version.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/besajilovosupepigopuwes.pdfIn PDF document text
    • https://7095e710-59ac-4d27-8a5a-f3bbcaf65deb.filesusr.com/ugd/418e76_3f74a58a6f674511944b42d2a851d7d1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/free_animated_powerpoint_templates_2019.pdfIn PDF document text
    • https://9e9203d9-9f5b-42f2-a849-05e42d741f90.filesusr.com/ugd/3527d5_b55f269975eb4f93861c3c20b4ebd0d2.pdf?index=trueIn PDF document text
    • https://16fd3b15-5541-4454-9538-28daacbf497e.filesusr.com/ugd/e32576_d75879ae220c4b17961f94e27cab217e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tibitexil/ark_survival_evolved_apk_highly_compressed.pdfIn PDF document text
    • https://4123e755-5e7e-4fb8-b167-49ba90d37259.filesusr.com/ugd/fd3290_9de2d163129b479fbb33d8209d2c143a.pdf?index=trueIn PDF document text
    • https://9e084d23-5bbf-42ad-98e9-fa9200f8584e.filesusr.com/ugd/4f663b_ed2a0206880d4791ae2c05883a9d8600.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_off0000e64b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64B 5456 bytes
SHA-256: e6d8c245855d61d5164b60400b18bda6f528b49b25d8088ecde02ea9370971e1
font_01_sfnt_off0000f8f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F9 13100 bytes
SHA-256: 5b8568525ca0fea88f4baca18bea8ee828ae72ce22f35b3273b70d50f01ca839

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