Malicious PDF — malware analysis report

Static analysis result for SHA-256 30a22143d0d9124b…

MALICIOUS

PDF

61.2 KB Created: 2020-12-26 16:52:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a54905cd7766ceb2afe854c15f0d2551 SHA-1: c179123bf4ed52875242ab80eed80565b9a6d181 SHA-256: 30a22143d0d9124bad121a03109f458d2130d1dbd6b94acc6e5396bbc2b94fe4
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 and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, suggesting a link farm or phishing attempt. The embedded URLs point to various PDF files hosted on external services, likely intended to redirect users to malicious content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafficel.ru/aws?utm_term=displacement+reactions+word+equations+worksheet PDF link annotation
    • https://foxevavudutis.weebly.com/uploads/1/3/4/3/134380199/fobusamewu.pdfIn PDF document text
    • https://cdn.sqhk.co/jafetegupam/X2cHjbJ/diwolunubop.pdfIn PDF document text
    • https://cdn.sqhk.co/vixokezafafu/RWImJYr/88456518106.pdfIn PDF document text
    • https://cdn.sqhk.co/xezojutatow/4icjdGv/timotupevesuneb.pdfIn PDF document text
    • https://cdn.sqhk.co/lokalofobox/LgeigdZ/26792444208.pdfIn PDF document text
    • https://lifalaril.weebly.com/uploads/1/3/4/8/134883644/mulifajivut_muxezebomipabiz_wajizara.pdfIn PDF document text
    • https://voziguwotameba.weebly.com/uploads/1/3/4/3/134345279/237228.pdfIn PDF document text
    • https://zugasemoz.weebly.com/uploads/1/3/4/5/134593751/a660d35d8.pdfIn PDF document text
    • https://jetosiwer.weebly.com/uploads/1/3/4/7/134767378/kafugavepuzobuv.pdfIn PDF document text
    • https://cdn.sqhk.co/purovufizu/BIOjhtP/90805888907.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/07404646-c1a6-4b85-94f9-493d38f07874/the_bone_season_series_in_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d56fff32-45cb-4bd2-a55e-6b56f6ca62c9/bugatosibibigadaradir.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_off0000b437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB437 5596 bytes
SHA-256: c1804d632d73e3696426ae03ff7dd1edef0d8e54ad82c3b332a178ce93f77450
font_01_sfnt_off0000c71f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC71F 9560 bytes
SHA-256: cad7acd81477217fac85e0fc0a156ad9e1a7af39539d73abe55e41c0bcba626b

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