Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ede8993a6c9089a…

MALICIOUS

PDF

73.2 KB Created: 2021-03-31 05:16:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d12a87ff78f1eaa4b7f05a94eb18c3ab SHA-1: 1eb074d58913344380cbe7333218b948b2abc6bb SHA-256: 3ede8993a6c9089aaa7787045a919e6844d7644b60e546edff568f96c1bd106c
156 Risk Score

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 0.9996

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://soxebez.ru/123?utm_term=asp.+net+web.+config+transform+appsettings PDF link annotation
    • http://mylic.ru/movimiento_uniforme_y_movimiento_uniforme_variado8a46i.pdfIn PDF document text
    • http://5coupons.info/69918919069du0xi.pdfIn PDF document text
    • https://cdn.sqhk.co/ximepadogi/ehgi9uf/recarga_rapido_claro.pdfIn PDF document text
    • https://cdn.sqhk.co/luwivimexu/rjcUSji/pongo_abelii_iucn.pdfIn PDF document text
    • https://cdn.sqhk.co/lomekojop/gfejjgc/wells_fargo_mobile_deposit_limit_amount.pdfIn PDF document text
    • http://life50it.pro/suralanurafenapuxedamudw9kan.pdfIn PDF document text
    • http://repair-telefonov.ru/82932827747mjfmb.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/kikunojulejuj/aithey_aa_dance_version_song.pdfIn PDF document text
    • https://4b3b4da4-1145-40fd-8a04-0ac29766dab0.filesusr.com/ugd/6c6203_21eb8554173a47f9886fd18c63f3eb44.pdf?index=trueIn PDF document text
    • https://9e269ae7-c3cf-4b9f-bde2-1d9be064b7bf.filesusr.com/ugd/139869_819a6b3fdda54ea38f5e153b806efebf.pdf?index=trueIn PDF document text
    • http://jimifodapamusos.rf.gd/65804880238.pdfIn PDF document text
    • https://8fc1c2d6-49ba-4d63-8b95-0327ef2b1627.filesusr.com/ugd/1849a1_74d4a22183e64a3b83f4c99207ab4b38.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/org._apache._spark._sql._hive_jar.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/how_to_do_manual_network_selection_on_iphone_7.pdfIn PDF document text
    • https://d4996ccb-aecf-47c4-aab6-3c4fe022e1b7.filesusr.com/ugd/b7ed05_45d3b701636842a99aa78eaff1937f56.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luropiw/parallelogram_method_of_vector_addition.pdfIn PDF document text
    • https://492f55f4-3442-4b37-b17e-39d9f2f0ae8a.filesusr.com/ugd/7dfe85_0effd9aeb6cf4378be675e84d8331073.pdf?index=trueIn PDF document text
    • https://f7690f66-1871-4559-97e0-239dee5b15da.filesusr.com/ugd/d2cc1f_8d4a833d07ab41169866c8444dcfbfea.pdf?index=trueIn PDF document text
    • https://6e229dea-1f83-4be8-8cd3-388eabd4f5e3.filesusr.com/ugd/1cfe37_9627d1ab00e84513b710bd23dded1aa7.pdf?index=trueIn PDF document text
    • https://7ef5d8b8-74ac-4e0a-b0a0-fa61ca6462a8.filesusr.com/ugd/23e9be_7474362308a7474a8e4b85153fb23a26.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/gexizerijizumunasew.pdfIn PDF document text
    • http://sajokibor.epizy.com/13295891283.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_off0000e2e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E3 5556 bytes
SHA-256: d4fb21f1dd5a2cec99786e149ce52cc9635857aa58e73707ed11a481e18762f0
font_01_sfnt_off0000f5cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CF 9712 bytes
SHA-256: cea018d0fde4ddbfb6e0925f9cc5e2641dbae0cd6e8d31bb811114b9ccb1d92a

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