Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1c156fb26850095…

MALICIOUS

PDF

96.3 KB Created: 2020-11-25 02:33:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 40f8354ff959112644d3c41e2f86dd61 SHA-1: d28188607bdbb0d1f109fb2ed4ecc4d7ef493c93 SHA-256: c1c156fb2685009538da103dd9b1f25f96926453cb13cc2165ae1063b7c9744d
156 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. 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-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://traffking.ru/strik?utm_term=bias+vs+biased+estimator PDF link annotation
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/8260080.pdfIn PDF document text
    • https://pisawaramas.weebly.com/uploads/1/3/4/6/134685908/velovebixakizom_ladokolipamuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487191/normal_5fbadd0422615.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/hammerson_reit_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/bunobu/10_dieu_rang.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/duvitilegutezilelujotox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89e4f5ac-8ed5-466a-bfdb-bde84ad5e1b6/8631612610.pdfIn PDF document text
    • https://s3.amazonaws.com/kizuporowefib/unblocked_games_24h_roblox.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/apes_mark_and_recapture_lab_somethings_fishy_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/rival_6_cup_rice_cooker_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/iti_marksheet_image_up.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/game_android_fps_apk_data_offline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7080ca1-f305-4b9f-b06e-8d8ba0ce3d7e/newuzavixenoxaj.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/census_2011_haryana.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/37208677540.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F2A 5188 bytes
SHA-256: 2fe7a60aa1e5fb40864a75fb80556d7ac17a577673c58dac051d93d90c56838a
font_01_sfnt_off000130b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130B8 13672 bytes
SHA-256: 6b3cf62a9164e0f1a29bb24452ada03dc2554b0017f59bef6d2c3d0f5871ca45
font_02_sfnt_off00015e31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E31 16228 bytes
SHA-256: 98c55dc21ef86d5df6961c14e76f75e06ba8f96f0f8d6804aa865f54651e9a3f

Open this report in the interactive analyzer, or submit your own file for analysis.