Malicious PDF — malware analysis report

Static analysis result for SHA-256 a342e55d2729e01b…

MALICIOUS

PDF

72.6 KB Created: 2021-02-23 12:10:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 44aab4136a66a8db9ebbbde3401d9d08 SHA-1: e9a4b57a525168c05c2a2a3f089b3efdc580e776 SHA-256: a342e55d2729e01b1384ce0a0afd489cd153e6c6a0ed9093c377a474bcc8abd7
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/aws?utm_term=how+to+replace+water+pump+2002+buick+lesabre PDF link annotation
    • http://spiritstudio.ru/what_were_some_weaknesses_of_the_articles_of_confederationrwsbb.pdfIn PDF document text
    • https://cdn.sqhk.co/nivodoruw/ayJ7Eja/89352033634.pdfIn PDF document text
    • https://cdn.sqhk.co/juvowisire/biijjjc/working_on_my_bucket_list_t_shirt.pdfIn PDF document text
    • https://cdn.sqhk.co/ronofumito/jbjauje/82601287292.pdfIn PDF document text
    • https://zexamedoguko.weebly.com/uploads/1/3/1/4/131454027/91c25c1a87d575.pdfIn PDF document text
    • https://cdn.sqhk.co/zojixemem/v9ZpGid/78104376071.pdfIn PDF document text
    • https://cdn.sqhk.co/satofurijob/jcGfrhY/55740231138.pdfIn PDF document text
    • https://kesakoti.weebly.com/uploads/1/3/1/0/131070149/2277823.pdfIn PDF document text
    • http://emirofficialzm.com/how_to_get_pdus_for_pmp_certificationmrr6s.pdfIn PDF document text
    • https://lumabejisojexu.weebly.com/uploads/1/3/1/4/131455378/8914858.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/lazolu/konemuwivepumadibuw.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/canada_boating_exam_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/29482438972.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/96308915065.pdfIn PDF document text
    • http://bibedufuranuju.rf.gd/workout_book.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_off0000dc2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2D 5612 bytes
SHA-256: 20a56fbcc5a7c6b4fc94e1778881c954b208a8a9dce4fef019618cb4aac6e26b
font_01_sfnt_off0000ef30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF30 11276 bytes
SHA-256: 6c1b8d6a2fe57f960808a3ad3d50d67baa888192eda6eb884d9dd85f5b1846e1