Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2cbfb9d9da35d17…

MALICIOUS

PDF

129.3 KB Created: 2021-04-18 02:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 35d02a5bc0caa5dc84c04f000fd9f587 SHA-1: dc4691ee196d5ed5fc672e26ce90eb865e16c475 SHA-256: c2cbfb9d9da35d17fe6563566e0cef95a0aadfc6f9223faec4e9b775e3fdadf9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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 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://nipisod.ru/strik?utm_term=yamaha+rx-v573+wifi+adapter PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4378157/normal_5fd055810f45f.pdfIn PDF document text
    • http://janorewaxeno.mygamesonline.org/88518390084.pdfIn PDF document text
    • http://juponuziwotaga.mywebcommunity.org/86715338576.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/band_pass_filter_design.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495400/normal_600c38c22382c.pdfIn PDF document text
    • http://hookup153.fun/arun_gawli_photoymmb8.pdfIn PDF document text
    • http://lixodamevurobar.mygamesonline.org/dell_latitude_e7450_price_in_bd.pdfIn PDF document text
    • http://zoguponuwuxoli.medianewsonline.com/replacement_parts_for_rheem_furnace.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468554/normal_6056e551c71c2.pdfIn PDF document text
    • http://kavakedego.scienceontheweb.net/wizanumapipalopasuwaturoz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368998/normal_5fc94a809fcfd.pdfIn PDF document text
    • http://cmbmarketing.agency/hp_officejet_pro_8600_plus_scan_to_macn71ee.pdfIn PDF document text
    • http://kudikadip.getenjoyment.net/nozugifakivelumakivaja.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jujuletofu.onlinewebshop.net/59051422062.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/965d5d4f-02f1-4f39-9627-73be251d3381/zexuvopafinapimubiw.pdfIn PDF document text
    • https://afa032df-bfad-47da-a9c8-c79260182993.filesusr.com/ugd/6f9b04_3bdd48b48b7b4055bdbeaea3705d8a62.pdf?index=trueIn PDF document text
    • http://kubomefewofumim.atwebpages.com/biodiesel_production_plant.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d69369b-8a63-42c6-86f6-552e967ba42e/32585917227.pdfIn PDF document text
    • https://ff19a39e-637c-4fc6-80cc-750024e8dd37.filesusr.com/ugd/d217e2_5712892fd589431eb9b887a35b2026ad.pdf?index=trueIn PDF document text
    • https://02687da8-bf2b-436b-a8ca-82c6e04513a5.filesusr.com/ugd/e48f8a_0e281b6ecb9748ffb192451e6767d66a.pdf?index=trueIn PDF document text
    • https://7404da97-7fcf-4d5f-9d5f-3f8644e6773a.filesusr.com/ugd/35f767_f480784676d94365ad5f3bc321da594e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d950b40c-80e0-44d2-8789-6564147bc5ac/lupiwed.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_off0001ba6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BA6A 5652 bytes
SHA-256: 6747c96baeb10d641c15674ffa239ba50d2f141af7bc9e2a7326cf0a17d132e4
font_01_sfnt_off0001cdae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CDAE 12044 bytes
SHA-256: fb552be352b1732f09b66daea3ed53465c40994eef794669b5f8fd65ebb5a76b

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