Malicious PDF — malware analysis report

Static analysis result for SHA-256 93bf38e30aeffb1e…

MALICIOUS

PDF

68.7 KB Created: 2020-12-03 02:06:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: be8937c5d21fd1fa7014376a7fc45211 SHA-1: 908503ff76888fbc93fe003fb92f8b741e4ab5a1 SHA-256: 93bf38e30aeffb1ea71c52a01ca3eb590cddc9301efbb5b4eae46c2ccbf58e3b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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 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://trafffi.ru/strik?utm_term=mr+coffee+ftx41+repair+manual PDF link annotation
    • https://tobuzedatenet.weebly.com/uploads/1/3/4/3/134322281/wupijevowituxor_koxemitavil_bukalupoped_faton.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496592/normal_5fc44a621372e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424682/normal_5f9f3bb038b7d.pdfIn PDF document text
    • https://popibixa.weebly.com/uploads/1/3/4/7/134745137/2136600.pdfIn PDF document text
    • https://wukemurorafol.weebly.com/uploads/1/3/4/3/134338373/gozinebugosuvop_giwelupek_bebafalizi.pdfIn PDF document text
    • https://sipopupomiva.weebly.com/uploads/1/3/4/3/134307082/tebiwuxik-karoruvalesun-ruvuxexopatas.pdfIn PDF document text
    • https://tixaradizu.weebly.com/uploads/1/3/4/6/134652762/memiwepebekodefene.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
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf1973485235c868a8c99/1606283674471/reflection_means_geometry.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f24c403f5353fd95fd42/t/5fc82530bbb7f45a927f17fc/1606952240567/jujamonebefuja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2400283b-0355-45cc-8102-4716fba6123f/download_microsoft_edge_app_for_pc_windows_10.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd124e4b66d17947f7375e/1606226510791/76496356270.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/bacilos_gram_negativos.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3789f084698658e6e9449/t/5fc8129592e74531f3bc4188/1606947478579/printable_chore_list_for_11_year_old.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c12b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC12B 5076 bytes
SHA-256: 0860391327cf59102dabbfeff4ef6fa4382afb5535924b6de43922897834477f
font_01_sfnt_off0000d264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD264 10912 bytes
SHA-256: 04fc9aacccaa768e9c8578066fcee646ab098134b6ca307f4695be6e563752b4
font_02_sfnt_off0000f672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF672 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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