Malicious PDF — malware analysis report

Static analysis result for SHA-256 023d8039c6f6f1b0…

MALICIOUS

PDF

76.8 KB Created: 2021-05-24 19:01:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c379a9990aa2802e9f603ba1669446b3 SHA-1: 11c666ad0395715c6f7adfd970c10fac848a8055 SHA-256: 023d8039c6f6f1b0b7cfd8605e7ad485adc90fdd8b607025ae59ee00d1891c08
164 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baarspo.ru/strik?utm_term=tamil+movie+2019+tamilrockers+free+download PDF link annotation
    • https://gatobutapasi.weebly.com/uploads/1/3/4/3/134364099/20e3be7bdfe0963.pdfIn PDF document text
    • https://pigukoziluluz.weebly.com/uploads/1/3/4/8/134896600/da399668b.pdfIn PDF document text
    • https://zobujopexa.weebly.com/uploads/1/3/0/9/130969678/9343638.pdfIn PDF document text
    • https://dasukixarukawo.weebly.com/uploads/1/3/2/8/132814138/6225343.pdfIn PDF document text
    • https://xitukamobem.weebly.com/uploads/1/3/4/6/134643312/ec5e1cbfb0d66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368504/normal_60638ee540890.pdfIn PDF document text
    • https://temerineg.weebly.com/uploads/1/3/0/9/130969052/83697878.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388046/normal_606b171d4436f.pdfIn PDF document text
    • https://fokinovev.weebly.com/uploads/1/3/0/7/130775288/numokomizosaki.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/31549725-97b7-4152-b95b-d34aed3869cf/kung_fu_panda_3_final_fight_po_vs_kai.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/input_type_date_format_in_angular.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/zosaneji.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/kavetodasovotemobuzovo.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/tp_link_hs200_vs_hs210.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51977fa2-a513-4b45-a776-c242d1ce8a28/stage_play_script_layout.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e64267d6-ff10-4886-bade-cf535942f2e4/how_to_write_a_good_mla_paper.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/esv_student_study_bible_online.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/everfi_quiz_answers_module_7.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/chicago_manual_of_style_footnotes_or_endnotes.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/dizajifajaj.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/23233670229.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_off0000ee03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE03 5812 bytes
SHA-256: 15d9d4d255c08182897ddf04b8b5462a9f36256afbd622cc8f0c8f0e15fdfed4
font_01_sfnt_off000101d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D1 10544 bytes
SHA-256: 9f3040d927f75c66cf4642e3b05fea981747d972846aacbe9be3e2ef1f48bfd4

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