Malicious PDF — malware analysis report

Static analysis result for SHA-256 d24aa67be9b6aaed…

MALICIOUS

PDF

81.7 KB Created: 2021-05-14 23:40:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 8b3e75660970bbfc6b2d32d3e59fa5e9 SHA-1: 7adf9bb81c0633d4cd384aa0ec2e857f521487ae SHA-256: d24aa67be9b6aaed403b3f8c2a94be7e8722bca69d181391cc9492c8a1bb30c3
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious sites. While no scripts were extracted, the PDF structure and numerous external links indicate an attempt to lead the user to phishing or malware hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://nipisod.ru/strik?utm_term=why+is+my+ti+84+screen+dark PDF link annotation
    • http://ttop-shop.com/marvel_movies_in_order_by_datehqeyd.pdfIn PDF document text
    • http://vuwimoxit.mygamesonline.org/hallelujah_leonard_cohen_roger_emerson.pdfIn PDF document text
    • http://yblda.fun/guxevopumopolp3lmh.pdfIn PDF document text
    • http://euroshopme.site/arbonne_protein_shake_recipes_coffeescwip.pdfIn PDF document text
    • http://gufutaca6.xyz/91716325937klcvk.pdfIn PDF document text
    • http://kunepuvobimamin.medianewsonline.com/96130851064.pdfIn PDF document text
    • http://eroganoficial.site/41863867499wp4nq.pdfIn PDF document text
    • http://marketeuro.pro/55789499943mgxw9.pdfIn PDF document text
    • http://bestunew.xyz/streamlabs_or_obs_livenujsz.pdfIn PDF document text
    • http://pubguckazan.com/medieval_total_war_2_guides6gk2.pdfIn PDF document text
    • http://se-mrush.com/adobe_premiere_pro_add_transition_between_clipsgy4io.pdfIn PDF document text
    • http://7evenrp.ru/52082215573ajzsp.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/baxekojojexusol/75262007576.pdfIn PDF document text
    • https://28546a20-d0cc-4b82-bb4f-6711990cd5a3.filesusr.com/ugd/0bcf16_3ffd0c1eeab64c9f95bb57f4cf397eb1.pdf?index=trueIn PDF document text
    • https://f6ea5e03-7e7c-4dce-82ee-fd5d223759ef.filesusr.com/ugd/d203ad_d44bbba4d5484d5f85a0c6950b382302.pdf?index=trueIn PDF document text
    • https://438e95ed-c264-4db5-88d3-1a9ca8b91b86.filesusr.com/ugd/733c1f_56d6b16325e74a7ba159a134a9fa9a65.pdf?index=trueIn PDF document text
    • https://0ea1ff7f-05b3-43a2-9744-178351a05ed1.filesusr.com/ugd/01f9b9_a510060dc31e46b2956457fae5250fbc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sitok/zubekezurofujilesinoved.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/68791240949.pdfIn PDF document text
    • https://5090c2af-253d-40c3-bfb7-942fc6db26b0.filesusr.com/ugd/0511f5_f46908d1525f446fbdb3284aff667e33.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_off0000ffba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBA 5608 bytes
SHA-256: 712fd2c528bbfb40303b77630f0491e4d39c7977dab414b7266158af63df166c
font_01_sfnt_off000112bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112BF 11484 bytes
SHA-256: 9bd202e2f70e0cc6274a1f1c7c92fdf77c1675afd254e6db183e7032524fba50

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