Malicious PDF — malware analysis report

Static analysis result for SHA-256 6708793d5fd184ac…

MALICIOUS

PDF

67.5 KB Created: 2020-12-06 17:19:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: cafe0a802751852babd4504982642872 SHA-1: d3c9ca772dcf392b0c36e75755501d445b8665a7 SHA-256: 6708793d5fd184ac8ec5189a6cb6fa757ae1aedc141edaec68a0216c0ed5e999
176 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. It uses a callback-phone (TOAD) lure. 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://trafftec.ru/strik?utm_term=babies+r+us+easylite+convenience+stroller PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427498/normal_5fba909724e9b.pdfIn PDF document text
    • https://dopolijakom.weebly.com/uploads/1/3/4/5/134527788/nipanak_pixumoxaroza_popojusanogodag_ramufuto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412905/normal_5f9e9f9d20230.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377902/normal_5f93cd32b4a87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408601/normal_5fa1bbdd7f8b5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc1999f5e8e827d4292cb4b/t/5fc422d33570fb44d18544a5/1606689495306/89360203149.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2a58c40f1034a5cb42298/t/5fca3b79d7c3040d873c20d5/1607089018335/70879774471.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91979a1c-df7a-4aab-9ba5-54f2b095de13/xuloritaguzutus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aca29ae3-ba57-4b38-83bf-c4ece488feeb/55851998934.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc57efae5c7695ca9ba963a/t/5fc5e4c83570fb44d1cea1c7/1606804682385/19031058952.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf607fa97599144eef238f/1606377599490/99535015619.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0426c7afe470b5574cb6/1606222886549/nickelodeon_logo_history_3.0.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1229e60-ad71-4c20-9465-c92dbbd3e765/minecraft_mod_menu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9FE 5144 bytes
SHA-256: e0bcc40d90803defcd3cf9c3e04e2d0b4fc4cb4a1af2527d5f6985318e635c34
font_01_sfnt_off0000db99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB99 11092 bytes
SHA-256: fe60758b4b605ea12670f34cf7d17945b1787a10ed97f68d4f67d0e4a19adb8b

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