Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdc17b627d56b1d3…

MALICIOUS

PDF

99.7 KB Created: 2021-06-15 12:27:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: cc33624442a8a66b3a3d9f3808ad176e SHA-1: 16e9da00cbdbf8bfee40cd04c7848eb9407762e5 SHA-256: cdc17b627d56b1d305cdb70090b2dd79d5081a4916af1abdd6a830ea5f1058a9
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on disposable domains or used for SEO manipulation. The ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly suggests a phishing or trojanized intent. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to redirect users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4538

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.
  • 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
  • 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://philabc.ru/pbw?utm_term=invertible+matrix+meaning PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369901/normal_603e0838e64e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406169/normal_60c3d83dc68ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498994/normal_5fcb5a2cbd833.pdfIn PDF document text
    • https://xuzekivaf.weebly.com/uploads/1/3/1/4/131453918/wafixuvotuna.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389792/normal_5fdfc7a20c966.pdfIn PDF document text
    • https://deluneruniji.weebly.com/uploads/1/3/4/0/134012649/rabanisobi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485322/normal_605f4eb2380f8.pdfIn PDF document text
    • https://dibosowosobon.weebly.com/uploads/1/3/7/5/137511826/gokitib.pdfIn PDF document text
    • https://satalediveli.weebly.com/uploads/1/3/4/0/134018026/de973d11.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417990/normal_60038f3346926.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424013/normal_60006819e661d.pdfIn PDF document text
    • https://wusunipusu.weebly.com/uploads/1/3/4/3/134320006/bapusof_bakagapopoz_majilobab_fewixali.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452846/normal_5fcbc0df96790.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403429/normal_60475fbe6e5f7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pijipusap.pbworks.com/w/file/fetch/145259019/ielts_graph_vocabulary.pdfIn PDF document text
    • http://laxaxufudej.pbworks.com/f/vafuti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30ec36b5-5729-4e4e-b2a3-eea6bc9a218b/48280088468.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47fb5ec7-81ef-4529-996f-88c16112b449/sub_zero_650_ice_maker_troubleshooting.pdfIn PDF document text
    • http://pajinap.pbworks.com/f/delonghi_magnifica_s_smart_cappuccino_maker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46bab556-7371-492d-9004-5517427739c0/ruxatevew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95adde8b-019b-4cda-9c12-8755b419d4ea/social_psychology_concepts_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/060313d2-86b7-4c16-b3b0-675798990ecd/on_the_origin_of_species_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1110210f-8609-4373-abc4-fc81a9d4239c/lycoming_engine_overhaul_prices.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc5920d9-9a7e-4f4a-8a5d-ea2a431e4454/jotogugezegegolanareb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20b7a93f-ec01-4176-a6cb-f5bc52942bbe/where_she_went_book_series.pdfIn PDF document text
    • http://tazusun.pbworks.com/f/does_navy_federal_offer_free_notary_services.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d81744d-397a-4052-860a-8cac50f81da2/what_does_black_blood_at_the_end_of_your_period_mean.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000167ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167EF 5032 bytes
SHA-256: 0c1a417deb00c6d885b4626007d8acab7adcedd89e40a5de34940964fc24b6f7

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