Malicious PDF — malware analysis report

Static analysis result for SHA-256 cee1b4002a0264e0…

MALICIOUS

PDF

77.2 KB Created: 2021-03-22 18:37:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2eeb3e5b5ab37413e1a1f0396aef924c SHA-1: df77e8328e0f1879158697737f5048d3c11bcc2b SHA-256: cee1b4002a0264e0573a2e6085b37833345e166206b1bc10545e78d1b3e3db51
186 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 0.9998

Heuristics 6

  • 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
  • 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://dafemum.ru/aws?utm_term=dell+e5400+won%2527t+turn+on PDF link annotation
    • http://rowomonug.mywebcommunity.org/74982513070.pdfIn PDF document text
    • http://xokezuwadem.mygamesonline.org/blue_collar_brilliance_mike_rose.pdfIn PDF document text
    • http://summ-green.fun/roland_td-4kp_electronic_drum_kit8073v.pdfIn PDF document text
    • https://wavamabixalovag.weebly.com/uploads/1/3/4/5/134525364/vitatezeme_jitetufof_dekapolikulaza_wufumifu.pdfIn PDF document text
    • http://epipog.com/libro_de_contabilidad_de_costos_de_juan_garcia_colin_gratisulgpx.pdfIn PDF document text
    • http://zajiledafalam.getenjoyment.net/a_level_computer_science_past_papers.pdfIn PDF document text
    • https://rawiranuxox.weebly.com/uploads/1/3/4/6/134618620/4034755.pdfIn PDF document text
    • https://vewosofi.weebly.com/uploads/1/3/4/4/134493368/0ab604.pdfIn PDF document text
    • https://dezuvatag.weebly.com/uploads/1/3/4/6/134667454/4ae6956ffe0f30.pdfIn PDF document text
    • http://muvepifare.mygamesonline.org/mercruiser_5.0_mpi_oil_filter.pdfIn PDF document text
    • http://igafnd.org/blank_cinquain_poem_template57s71.pdfIn PDF document text
    • http://premiumpornclips.com/financial_report_typesp6e61.pdfIn PDF document text
    • http://edarudost.online/jufatepopezorczdhz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f608bf75-187c-4b28-9621-af925c05c2b6.filesusr.com/ugd/05e3ad_e09190b09faf4fe8b12e6965e0e3b6b7.pdf?index=trueIn PDF document text
    • http://totuxivez.onlinewebshop.net/how_to_draw_comic_characters_for_beginners.pdfIn PDF document text
    • https://03aaa7dd-6608-466c-a68c-f41c59811c05.filesusr.com/ugd/ae15ca_ab6fce9058274393babf7578103291a7.pdf?index=trueIn PDF document text
    • https://c63ca81c-6df4-4ec3-bc2e-8508f29a6879.filesusr.com/ugd/d48fe3_0eb8cf3d691d489bb2eafc3e5bb7d585.pdf?index=trueIn 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_off0000f188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF188 4768 bytes
SHA-256: 99e4de83bf977e632e4c5f0a6692d3de1ea1a084f71f204f583440df1c84c75d
font_01_sfnt_off000101fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FA 11580 bytes
SHA-256: 44d7ce4ee95d967b7b9c9e473fcb0e6d4bf087a31c294cc7cba1bbc84587dcbe

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