Malicious PDF — malware analysis report

Static analysis result for SHA-256 eff257fc448c930e…

MALICIOUS

PDF

76.6 KB Created: 2020-11-13 22:50:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5bc976d7a76b7c0df25040f715a3462a SHA-1: 93834a848904e93ab8cfe8e2e5c39d10d6c79fec SHA-256: eff257fc448c930e69255e09e7bfdb20be019c9317e1feb12aeadcefdad44bf9
154 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. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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.
  • 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://ggtraff.ru/123?utm_term=real+jigsaw+puzzles+free+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383467/normal_5fa886253ea6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383156/normal_5fa11cfc4c1b5.pdfIn PDF document text
    • https://pepuzategazeg.weebly.com/uploads/1/3/1/4/131453576/6594630.pdfIn PDF document text
    • https://dojudiwoju.weebly.com/uploads/1/3/1/4/131406456/5426e4f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5f93793923e69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f9b7eb0e7574.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420432/normal_5fa0a3d150d77.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
    • https://uploads.strikinglycdn.com/files/0f1a9d5c-b911-4066-a2ed-c9b3b8302f73/69376125556.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/806374c8-8402-45c8-bca9-94ab47535e18/waffle_house_nutrition_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93c8d949-affa-4c0e-805f-0598c22c2dac/74421733246.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32ea5b09-a653-4627-bbb5-be515ec02b36/23270631582.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa20f4b2-9429-4ac2-bcba-35850bfc91ad/71271628784.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB20 4944 bytes
SHA-256: 8b535131044c1685d1830399a2b5ffceecd841bf1034d77b1f2b39c37eae3604
font_01_sfnt_off0000dc29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC29 11068 bytes
SHA-256: 9ae3a4224e761c39fed0caa3ad7d2b62dc0a89fdf64cc09f7f99f13214fb51b0
font_02_sfnt_off0001021b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021B 16092 bytes
SHA-256: 2c5f1a2e3d9f683f6a217a47aeaaae813f7d4ef732a5ff54a929695507d09140
font_03_sfnt_off000116e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E1 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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