Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec3f496aab12eda7…

MALICIOUS

PDF

78.5 KB Created: 2021-01-22 04:40:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f0a35d008ccde749aecb2adf95c40d7b SHA-1: 90cc305bfda9295f70ec21c558bcbbabc39288af SHA-256: ec3f496aab12eda7a1ba2d2a37135e3248040b2b944e0c2880ddfec9a7d56a51
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of embedded URLs, with one specifically identified as a known malicious redirector. The document body, though heavily obfuscated, appears to be related to an 'Adler sewing machine manual', suggesting a lure to disguise the malicious links. The presence of numerous external links points towards a link farm or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?utm_term=adler+sewing+machine+manual In PDF document text
    • https://static.s123-cdn-static.com/uploads/4475863/normal_5fe1ba9958792.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414701/normal_5fe7bb75a58da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404292/normal_5ff5d2e20b53b.pdfIn PDF document text
    • https://site-1172276.mozfiles.com/files/1172276/backup_android_whatsapp_messages_on_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501212/normal_5fd14b2155183.pdfIn PDF document text
    • https://zuvimetuna.weebly.com/uploads/1/3/5/3/135304981/tesofavaraz.pdfIn PDF document text
    • http://pigovaze.iblogger.org/36336707669.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402261/normal_5fe1699fc05f8.pdfIn PDF document text
    • https://site-1171435.mozfiles.com/files/1171435/eagles_greatest_hits_vinyl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410190/normal_5fd155b1bfcda.pdfIn PDF document text
    • https://mowazaxof.weebly.com/uploads/1/3/4/7/134704653/b36e0441.pdfIn PDF document text
    • https://site-1176507.mozfiles.com/files/1176507/minokaxesezuranijevira.pdfIn PDF document text
    • https://site-1175091.mozfiles.com/files/1175091/pilot_jobs_houston_texas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419818/normal_5ff67fe0841b0.pdfIn PDF document text
    • https://nozoporunetub.weebly.com/uploads/1/3/0/8/130814805/51863d567edc.pdfIn PDF document text
    • http://tipaxoj.66ghz.com/24054361806.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446016/normal_5fcd1ac862865.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494677/normal_5fefcb9d1cd5f.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://madanekobovuge.epizy.com/google_sheets_sign_in_template.pdfIn PDF document text
    • http://vepilezora.epizy.com/wusedum.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e92e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92E 5124 bytes
SHA-256: 7d4cae82d599d1834f072d79b7737afb0344c9f552c0f81b00ff8f39be929d0b
font_01_sfnt_off0000fa63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA63 10512 bytes
SHA-256: 4e13e7c2d95c772cb0c99eaf861cb5a7ca80c46b58675275cacd475f9a23358d
font_02_sfnt_off00011e38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E38 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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