Malicious PDF — malware analysis report

Static analysis result for SHA-256 0800618ec00fbc09…

MALICIOUS

PDF

69.6 KB Created: 2021-03-22 18:30:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d985c31fef731c0d0a38c658574bf25 SHA-1: c61fb53edd5e8f4172afda050b15d90606ad1394 SHA-256: 0800618ec00fbc0969e8f60d0e9cac89a28fc42e90dab78c0481b610bbf82fe5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of embedded external links, characteristic of a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically a phishing or trojan payload. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to malicious sites, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/wix?keyword=mascara+applicator+guide
    • https://mugunerer.weebly.com/uploads/1/3/4/4/134479547/mukafuselulojuto.pdf
    • http://rexonina.medianewsonline.com/how_to_be_interior_designer_without_degree.pdf
    • https://wewebaviwipi.weebly.com/uploads/1/3/0/7/130775561/9596190.pdf
    • https://kererivodukeje.weebly.com/uploads/1/3/5/3/135303009/duwexutusolesu_jepozudoku.pdf
    • http://xufamorazogubov.sportsontheweb.net/cyberpower_pc_back_fan_not_working.pdf
    • https://rogenogenitel.weebly.com/uploads/1/3/4/3/134316557/f08f6fbde55f.pdf
    • http://dapodulasopo.iblogger.org/misunodavetezuj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://6b52f5a6-db44-4d3e-8337-ab33c729cb13.filesusr.com/ugd/f4de5e_a2fb728d03394758a782f482e5e0c58a.pdf?index=true
    • https://s3.amazonaws.com/luborinizu/motorcycle_diaries_plot_summary.pdf
    • https://09ec27ad-13b2-4d6a-9bba-a73d40af2dac.filesusr.com/ugd/309646_4b7d4ef0de724f34be5e668ee758e979.pdf?index=true
    • http://jibukut.epizy.com/haloalkanes_and_haloarenes_class_12_ncert.pdf
    • http://fepetixapokurob.myartsonline.com/thinkorswim_fees_singapore.pdf
    • http://tidovaj.epizy.com/jozoj.pdf
    • https://86f5e18a-8766-4ae7-b9bf-31430b627380.filesusr.com/ugd/911c12_f27c9efd98c542a3935f447db99b617e.pdf?index=true
    • http://pizowaxe.rf.gd/odisha_map.pdf
    • http://rogomore.myartsonline.com/lord_of_the_flies_symbolism_essay.pdf
    • https://s3.amazonaws.com/pomaxa/yowhatsapp_apk_2019_uptodown.pdf
    • https://314f4944-3dd9-45af-b5ee-fc7f46c963e4.filesusr.com/ugd/73cb9e_88e97b6630864974a892f3ef138897c6.pdf?index=true
    • http://mizuvawilukilel.rf.gd/constipation_in_pregnancy_guidelines.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c518.bin
c294b8ad276b8a6f88a97e598c4f8a0f7d1eb4322450a4c1f3c8f2fe03906134		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC518 5024 bytes
font_01_sfnt_off0000d63a.bin
eb017bbeee71d2113d651bc5c5a060cd04813fecd9ce21a94798da0bc0c5f0b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD63A 10964 bytes
font_02_sfnt_off0000fb85.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB85 4324 bytes

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