Malicious PDF — malware analysis report

Static analysis result for SHA-256 143ebb63bb18bf99…

MALICIOUS

PDF

73.7 KB Created: 2021-03-15 20:41:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0007737276ce3ed3f926015474765c40 SHA-1: b78cc3696985ef708080c5da1ce733a03ecaa385 SHA-256: 143ebb63bb18bf996f7481137cf492bf0a171830645b8b18773814da47257dd7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9991

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://fokemale.ru/strik?utm_term=magic+chef+electric+stove+top+knobs PDF link annotation
    • http://vvinorama.website/megavobusavafuxoja7hqef.pdfIn PDF document text
    • https://mirotimazafisel.weebly.com/uploads/1/3/4/3/134352803/1146013.pdfIn PDF document text
    • http://baltika-trans.com/tujemadewurumesed8scn.pdfIn PDF document text
    • http://it50life.pro/rulopukjl8ic.pdfIn PDF document text
    • http://mysteps.online/97765485654bcbb6.pdfIn PDF document text
    • https://cdn.sqhk.co/loziromegon/fXigYhc/26993018430.pdfIn PDF document text
    • https://cdn.sqhk.co/xeribaba/djiZ5hf/trap_dungeons_2_pro_apk.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/blacks_law_dictionary_8th_edition_citation.pdfIn PDF document text
    • https://butilitari.weebly.com/uploads/1/3/3/9/133997497/pexedetogirijeki.pdfIn PDF document text
    • http://rollernefritmassage.xyz/79768605476icb88.pdfIn PDF document text
    • https://begazasageb.weebly.com/uploads/1/3/1/6/131637419/ad1dd38.pdfIn PDF document text
    • http://kujamemapevubu.mypressonline.com/dukidorovufaselogawab.pdfIn PDF document text
    • https://cdn.sqhk.co/pozigafo/jgMjcnk/flyers_poster_maker_graphic_design_banner_maker.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/605b871f-beea-49a3-ac6c-58e93e9f3314/joseph_prince_church_texas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eadf7760-18fe-4d76-b6d9-d5b124a5330d/tejis.pdfIn PDF document text
    • http://kepawomokatuke.myartsonline.com/precalculus_with_limits_a_graphing_approach_7e.pdfIn PDF document text
    • http://ziwivazud.onlinewebshop.net/maya_angelou_biography_for_kids.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5df524ff-2cbb-4e76-b1d4-b570b0a0641c/genograms_assessment_and_intervention_4th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b38ff92-df60-44c6-82e7-0ea00d971f12/sofewe.pdfIn PDF document text
    • https://fa202315-5cd5-4006-9a99-7c5d4406650e.filesusr.com/ugd/61804c_b6f4a29a62fa4fdd90f9cad551a7cfab.pdf?index=trueIn PDF document text
    • https://704d67de-a0ba-412a-a77d-f8c4cf0d88a3.filesusr.com/ugd/a83d94_f21fdc277c944273b1a67cdd427cab28.pdf?index=trueIn PDF document text
    • https://c827806f-f9bf-4fd3-a4ce-e487c020fa79.filesusr.com/ugd/6fd45c_c47459849efd4a1681d59f996974ac86.pdf?index=trueIn PDF document text
    • https://43081b45-6e48-4b43-b724-9328fda377ae.filesusr.com/ugd/26481d_f9448a779e43413a9525a3d1dc168e3b.pdf?index=trueIn PDF document text
    • http://geforagegi.atwebpages.com/how_do_i_reset_my_maytag_front_load_washer.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_off0000e127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE127 5548 bytes
SHA-256: 397bd89ef678a88779a5f0f98ae40894c3b0d70adf460c5cda11027ef8e65403
font_01_sfnt_off0000f41c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF41C 10972 bytes
SHA-256: 3226deb9e58bbc30ec90c29daf27c939213ec413435229f0d81e021dcb91843f