Malicious PDF — malware analysis report

Static analysis result for SHA-256 a75506dba1de5576…

MALICIOUS

PDF

84.3 KB Created: 2020-12-24 20:06:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f19abef5e67f51c5d10f63b860f0adbb SHA-1: 9022f96b9d2e76604ec6e89d248ad1cc3a0025d8 SHA-256: a75506dba1de557646aae0c76f58a3b856bb85169ee540ebb4e9c72f62a60662
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic identifying it as a malicious redirector. Another heuristic flags it as a link farm, suggesting an attempt to drive traffic to potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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://cctraff.ru/aws?utm_term=difference+between+christian+and+catholic+yahoo+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373516/normal_5f897285883c6.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/mixamaded.pdfIn PDF document text
    • https://cdn.sqhk.co/linerutinew/KDjjFRk/24311461820.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380076/normal_5fd7a0b9ef610.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465543/normal_5fdc4a625713e.pdfIn PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/924405cb8ca788a.pdfIn PDF document text
    • https://judadumoxa.weebly.com/uploads/1/3/4/7/134718892/xever-rexewefupiguwaf.pdfIn PDF document text
    • https://cdn.sqhk.co/lasesekov/dhdSKid/zabesuwawixofojewa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/vukusa/lipisilaxiziputajuro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec8364ce-59c5-4048-8a7c-58ecfbd69b4e/7933215227.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/182b02ca-4bab-4034-ad76-661323c22a9f/84860979027.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a56308c-79ca-4021-894a-77f89989f110/bloons_td_6_apk_latest_version_no_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee3d6499-88d4-406a-bcb5-efd7a45da694/28646671559.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2852dc3a-2832-4a89-945c-fe950de21aac/time_sert_2200.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD320 5440 bytes
SHA-256: 9b2601c2602395153e708a0527b477f4e7684eb11ef2529e5ee91bf2e624c190
font_01_sfnt_off0000e5b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B3 3720 bytes
SHA-256: 40ef96da86b6123d577d475be460de15c41b9ca7393a8e650be4e9942aa3c64b
font_02_sfnt_off0000f115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF115 10996 bytes
SHA-256: e04155f1e77273bc13c09b7dc7821e87e50ff3af262dcc0071f8b87e076733c2
font_03_sfnt_off000116b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B1 16344 bytes
SHA-256: 3745d395dffe053ce12bb6e6d543a89fda750690c61e1e786fb35984b58e44e5
font_04_sfnt_off00012c66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C66 6460 bytes
SHA-256: 526f072e537d8d5ceabab34ae2b81340c5b476ad7ba975ce0eb5dd71a14f6917

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