Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd0e29712322eae3…

MALICIOUS

PDF

75.4 KB Created: 2021-05-19 07:14:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7de7cee91b6a972749fa2fa2beb03a59 SHA-1: cc3879051ab07ee995f0d2c8717ed8330c59bd1d SHA-256: dd0e29712322eae3fdda8de0b843a2c3028e897d7d2cf3c3ec47d80932c09f75
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was identified as malicious by ClamAV and an ML classifier. It contains a large number of embedded external links, with many hosted on disposable domains, suggesting a link farm or phishing attempt. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate potential for malicious redirection or content delivery.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://golowaki.ru/strik?utm_term=what+is+the+etiology+of+leukemia PDF link annotation
    • https://labisafedowep.weebly.com/uploads/1/3/4/7/134722654/tekenofus_fator_weliwabubipi_nogegabimeli.pdfIn PDF document text
    • https://dagigofeno.weebly.com/uploads/1/3/4/8/134887245/330804.pdfIn PDF document text
    • http://gusudula.iblogger.org/83282254381.pdfIn PDF document text
    • http://sagokorize.22web.org/89679566406.pdfIn PDF document text
    • https://rugalasaludazi.weebly.com/uploads/1/3/4/6/134683923/fojuweriziwugorek.pdfIn PDF document text
    • https://rirudelibuwa.weebly.com/uploads/1/3/1/6/131606594/tiwupaj-gilidi.pdfIn PDF document text
    • https://jidobatixinel.weebly.com/uploads/1/3/4/7/134726111/gevolumewanini-wakorudij.pdfIn PDF document text
    • https://jumomemokipus.weebly.com/uploads/1/3/0/8/130874307/7cdcf4e2cd210.pdfIn PDF document text
    • https://fepexugoroba.weebly.com/uploads/1/3/4/4/134469665/ropijisizosoji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jawigunomuj.epizy.com/511._1_case_study_of_a_child_in_english.pdfIn PDF document text
    • http://kesobiw.rf.gd/identification_of_pathogenic_fungi_campbell.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/to_be_or_not_to_be_parody_homework.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dffe1aa-7a87-4795-8817-28b7631dd869/where_is_the_furnace_in_a_mobile_home.pdfIn PDF document text
    • http://tudaket.epizy.com/carry_on_my_wayward_son_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cda60137-455d-4e4f-9e43-a0885703fbb8/how_many_sweet_potatoes_is_4_pounds.pdfIn PDF document text
    • http://dojirezanis.epizy.com/34287603289.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/70496886560.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_off0000ebd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD9 5264 bytes
SHA-256: d6d85d4ed3e99e838f922ab8c9423eb2bd1d4a6a8f7dce600fb66a5a7038321d
font_01_sfnt_off0000fdb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB6 10148 bytes
SHA-256: 20941a0c2480faae33548b54023f0644cb6ae360bec591a5e0220badbbbf99f8

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