Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e32bc954f385a07…

MALICIOUS

PDF

76.2 KB Created: 2021-03-18 20:31:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d62989c03d7cf8013edab390b141e7ec SHA-1: ed64bb24d15237e6cf165f0b87d844e9fa8c2ff0 SHA-256: 8e32bc954f385a0734e3a2694769f5b26e9e2ee4aea741b60f05330baccf1679
96 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent link to 'vilenefex.ru' suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, further supporting this. Although no scripts were explicitly extracted, the presence of embedded URIs and the ML classifier's high confidence score point towards malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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://vilenefex.ru/123?utm_term=audit+report+new+format+2018-+19
    • https://cdn.sqhk.co/xonipavu/w6hhjgW/residence_meaning_in_marathi.pdf
    • http://smeshnoykir.space/mejixobuwu7mpjt.pdf
    • https://mobinefoju.weebly.com/uploads/1/3/1/3/131398425/ririsoja.pdf
    • https://votuwokikinoso.weebly.com/uploads/1/3/4/4/134466575/2107184.pdf
    • http://deemonatrafik.xyz/lewirerovoruzizenifepohfbcf.pdf
    • http://urott-hu.com/blade_and_soul_unreal_engine_4_release_date75282.pdf
    • https://bijivabaj.weebly.com/uploads/1/3/4/6/134601785/78de4cc0dd1aee.pdf
    • https://cdn.sqhk.co/raxoxawupej/ij1qCG7/1194886226.pdf
    • https://cdn.sqhk.co/resesexiraf/M8jgjj2/sales_and_marketing_manager_jobs_near_me.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/guvovigo/mpsc_group_c_pre_exam_answer_key.pdf
    • https://s3.amazonaws.com/patotale/ronutikaxikodizefuxul.pdf
    • https://s3.amazonaws.com/tozaduliwubega/manualidades_para_halloween_nios.pdf
    • https://uploads.strikinglycdn.com/files/98cd0e0e-1892-4693-bc34-6940a75948e5/moto_x_2nd_gen_price_features.pdf
    • https://s3.amazonaws.com/kozewuposoridil/mobogenie_lite_android_2._3.pdf
    • https://uploads.strikinglycdn.com/files/136a63a4-00e3-4cd6-bbe5-8976d8832ba8/remobenibigafugi.pdf
    • https://uploads.strikinglycdn.com/files/8bd395aa-7a13-428d-b84b-5a6d83b74cfd/2265009767.pdf
    • https://s3.amazonaws.com/meludav/dog_vaccination_card_template.pdf
    • https://s3.amazonaws.com/sagotomagin/51624804734.pdf
    • https://s3.amazonaws.com/falufusu/the_secret_life_of_the_american_teenager_season_5_episode_17.pdf
    • https://uploads.strikinglycdn.com/files/6c9a69c6-cd60-4741-a9df-79cd207b2224/76455677254.pdf
    • https://s3.amazonaws.com/xabalaru/at_home_camera_home_security_apk.pdf
    • https://s3.amazonaws.com/fevobelijogal/43594925518.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e92a.bin
bbcc76a38375c6703bdf24c0a868626aec922e179e26290e0d9307c5b10e3b5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE92A 5764 bytes
font_01_sfnt_off0000fcd5.bin
101cd0873dbe39b86814158c6392d3d094e0a04688276c9bfd410f79d3f2df1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD5 10980 bytes

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