Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e8c12a98a2b465f…

MALICIOUS

PDF

89.1 KB Created: 2021-04-29 13:02:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 162a19c76fd0fb4d5faa15fd126abd24 SHA-1: f148ccc75c8171e3a0fc9772cb2066f57f3c0366 SHA-256: 5e8c12a98a2b465f765e0e79865235952f6800fef7fd11da06ab02b6ccf0f417
156 Risk Score

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 0.9992

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://dugedepap.ru/strik?utm_term=how+to+use+oster+toaster+oven+air+fryer PDF link annotation
    • https://nikalakikezune.weebly.com/uploads/1/3/4/7/134753818/1797034.pdfIn PDF document text
    • https://xumefuzodagugud.weebly.com/uploads/1/3/1/3/131384373/duturemo.pdfIn PDF document text
    • https://pikimitif.weebly.com/uploads/1/3/3/9/133997727/55300.pdfIn PDF document text
    • https://negowisavu.weebly.com/uploads/1/3/1/4/131406226/tawugevoli.pdfIn PDF document text
    • https://gedibixofesona.weebly.com/uploads/1/3/4/6/134688069/mowureniwafi-zofanap.pdfIn PDF document text
    • https://nuvuxupu.weebly.com/uploads/1/3/4/5/134507381/76c62c4fee.pdfIn PDF document text
    • http://fakixigulidol.mywebcommunity.org/what_is_grounded_theory_analysis_in_qualitative_research.pdfIn PDF document text
    • https://pulaberiboz.weebly.com/uploads/1/3/0/7/130775840/vavotosanorus-polifo.pdfIn PDF document text
    • https://sepuvomaxobaba.weebly.com/uploads/1/3/5/3/135311468/wivukifi_bikedinezabon_pukemejuger_jozibomovepodev.pdfIn PDF document text
    • https://kobizixudowizeb.weebly.com/uploads/1/3/4/4/134402546/zobujoxemipu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9042e326-c85f-44e6-b9b6-0c206471fdba.filesusr.com/ugd/0d2fda_9c12798f6c274b218ba0a68c5be3a2f5.pdf?index=trueIn PDF document text
    • https://4dcfe184-cd6c-48f8-9f23-5461c743a1d4.filesusr.com/ugd/cc8533_322fb6365bb6427ea63c1c8139f03872.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/26939704321.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/god_eater_2_rage_burst_material_guide.pdfIn PDF document text
    • http://lipeporo.onlinewebshop.net/blank_yardage_book_template.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/62292003869.pdfIn PDF document text
    • http://jurizamumi.myartsonline.com/regudazorulomovesinobi.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/what_to_paint_easy_on_paper.pdfIn PDF document text
    • http://totefopige.atwebpages.com/didivuvoj.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/17317327959.pdfIn PDF document text
    • https://f8d4b294-f952-4a11-85e8-0a3036f9bdaf.filesusr.com/ugd/ad8f3a_2f24e368fbbd414cbade0fee1e18a11f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bivanud/temporal_bone_dissection_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/diet_for_anemia.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_off00012031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12031 4944 bytes
SHA-256: 50a25a678b179e0c4ebcf94d0161dbd9890c8820d7cbbf2aca799d796f9359bc
font_01_sfnt_off0001312d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1312D 10960 bytes
SHA-256: c778453d5180b337ea99b8897527e996d6df702acb993c89709ee6142bad0067

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