Malicious PDF — malware analysis report

Static analysis result for SHA-256 3401308dcf050a6a…

MALICIOUS

PDF

80.8 KB Created: 2020-12-28 03:33:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 4392571c7c5de76f632fc9377389921d SHA-1: d4d69257546c92cf18f3f37080ea999473366372 SHA-256: 3401308dcf050a6a819e98c6d4a8b46562fb9237d46415f57b6191f75ba12d19
156 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 by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The presence of a large number of external links, including the primary URL https://trafffi.ru/strik?utm_term=talking+birds+petsmart, suggests a link farm or phishing attempt. Although no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent, likely to redirect users to a compromised site.

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
  • 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.
  • 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://trafffi.ru/strik?utm_term=talking+birds+petsmart PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462093/normal_5fa398046d726.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467573/normal_5fcc9def95224.pdfIn PDF document text
    • https://wezenazuzive.weebly.com/uploads/1/3/4/7/134764498/67512adddbdc.pdfIn PDF document text
    • https://delimilakemasuj.weebly.com/uploads/1/3/4/4/134400920/golemabupoverujegomi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371265/normal_5f8896c9665da.pdfIn PDF document text
    • https://tadinitalu.weebly.com/uploads/1/3/4/7/134744808/282b6de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425214/normal_5fbd238b28298.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407810/normal_5fb599fca6213.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401976/normal_5fc3425f7eb02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411503/normal_5fad88e3da602.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/betimugi/google_docs_movies_list.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/light_reflection_and_refraction_class_10_download.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF49 2968 bytes
SHA-256: 771033003054101e9e87eceebec65dd17fac76109d4f476580acb9549e794e17
font_01_sfnt_off0000e9ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EF 5432 bytes
SHA-256: f4d9e0771d5d5f87f0754de55c951b903f71433cbe749eed6feb040e2e4476c6
font_02_sfnt_off0000fc4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4B 10744 bytes
SHA-256: 29d6ca5d1a43b50a51576a77bb12b30ee5370332c621d8c9dcfe3ec0e0a21128
font_03_sfnt_off0001213b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1213B 16144 bytes
SHA-256: 2a5f1667c2e343500efde63e3dd6a136498333968b1680966ac5eb34589f1174

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