Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2dd57af26d0474a…

MALICIOUS

PDF

71.9 KB Created: 2021-05-25 08:50:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7107d013450c13bdae468948cc51500e SHA-1: 536d90572fbcef503d2d4f0246905d950e936c07 SHA-256: e2dd57af26d0474a24f8cc86a8e115973ff6fb33fd3d64dcb46e6b607193928e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with the primary URL being `https://botokaw.ru/strik?utm_term=who+makes+john+deere+plus+50+oil`. This heuristic, combined with ClamAV and ML detections, strongly suggests a malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/strik?utm_term=who+makes+john+deere+plus+50+oil PDF link annotation
    • https://vutajavegev.weebly.com/uploads/1/3/4/0/134040502/fezatofadozuvofad.pdfIn PDF document text
    • https://texoxarisozitew.weebly.com/uploads/1/3/0/9/130969357/gerawowupafew.pdfIn PDF document text
    • https://suxuwimuwudex.weebly.com/uploads/1/3/4/6/134641155/letewumoziturez_turonuxon.pdfIn PDF document text
    • https://vevikonupefafo.weebly.com/uploads/1/3/5/3/135391347/e96ce83ba03.pdfIn PDF document text
    • https://rigitugatelimo.weebly.com/uploads/1/3/4/1/134131632/3ec49f5.pdfIn PDF document text
    • https://tewawabuse.weebly.com/uploads/1/3/1/4/131437503/wuxoz.pdfIn PDF document text
    • https://pagopolekabob.weebly.com/uploads/1/3/4/3/134305888/jexefudizabiv.pdfIn PDF document text
    • https://tekeginisexufu.weebly.com/uploads/1/3/1/3/131381150/78604d05c9b7d.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/2bfefceb-2c1e-457f-9ee7-8c79afaf19ec/kenmore_elite_catalyst_washer_wont_turn_on.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/41690612843.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/tutabuxaputogebas.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/hillingdon_hospital_cqc_report_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/file_social_security_representative_payee_report_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cddc990-52f1-4a5c-a31d-d2f06940774e/37001949548.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/wifi_hotspot_software_for_laptop_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01049d84-6598-4fd5-8843-6d95663538ba/perododigapisuzuwixulazox.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/64857771513.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_off0000da3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3B 5620 bytes
SHA-256: 3d49826ee6de0647cc6bbb13cd53bdeb6060a13489e31e67640b7f4ed6eda8c0
font_01_sfnt_off0000ed3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3B 10720 bytes
SHA-256: 74c6fc3e3905f5b798fb66c743415b5bf12ce8e3cdb2227771b9bac25aba793a

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