Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0c1ca0ff61d8d75…

MALICIOUS

PDF

78.6 KB Created: 2021-03-16 16:06:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9c6f6d377eefc9d6dfa2fd17c420185e SHA-1: 5bd7b5ef0383aca8f6536ee47dc685697877b2c2 SHA-256: b0c1ca0ff61d8d7537d602ddeaa93428f1abb31bd1fb206a38051979857685ef
186 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 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.
  • 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://dugedepap.ru/wix?keyword=springsteen+tour+2020+italia PDF link annotation
    • https://zozetaxurumel.weebly.com/uploads/1/3/4/5/134590082/6207912.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450040/normal_604cbef187adf.pdfIn PDF document text
    • http://jejunobu.iblogger.org/8464095685.pdfIn PDF document text
    • http://luwakixifotizim.iblogger.org/zobikofeset.pdfIn PDF document text
    • https://vamotavobepud.weebly.com/uploads/1/3/1/4/131438348/5350241.pdfIn PDF document text
    • https://rotarivinevi.weebly.com/uploads/1/3/4/5/134599250/kololepofim-mupuvikogu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453334/normal_5fe66685048e9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nipofoxi.epizy.com/baby_i_m_amazed_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d0a8317-0e3e-448f-ad67-180d3839e5c3/ruger_lc9s_review_truth_about_guns.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3fc39f9-d410-48d7-8dc3-8ae2cc1db736/how_to_use_mineral_turpentine.pdfIn PDF document text
    • https://a3c35cc3-4a3f-4d41-ab51-8b3e4b114d30.filesusr.com/ugd/2b25b5_1f781e357a1749f3a6940bf28aaad2e7.pdf?index=trueIn PDF document text
    • https://d17f4099-ecc1-42b1-9c73-51521793457c.filesusr.com/ugd/4a2613_4c9b4f8b4eff434db1d07b143c6d4fdd.pdf?index=trueIn PDF document text
    • https://07bd7893-a6ec-44d5-90fe-c719e602c0bd.filesusr.com/ugd/aafaff_32493d316ba54659abc46900d4871745.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/saxefi/finding_equivalent_fractions_worksheets_6th_grade.pdfIn PDF document text
    • https://cd753cf5-d90a-4073-9c55-931a76e81761.filesusr.com/ugd/8826df_4bc18507732f48fcb0c8874439ae8a0b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jivuxo/nixesubez.pdfIn PDF document text
    • http://renaxodemebi.rf.gd/busybox_apk_github.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

Related samples 8

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_off0000e69d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69D 5244 bytes
SHA-256: 9536155348f9d7a63afc5ac9af08900fa320555eb06e2dde9f4b35325d2c7476
font_01_sfnt_off0000f877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF877 11840 bytes
SHA-256: d1f424f3e1f21e97337519f581d4054f02bbad974f97f0d746367538fec537e6
font_02_sfnt_off00011f03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F03 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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