Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d5bf303e6b6ed3d…

MALICIOUS

PDF

83.3 KB Created: 2021-05-24 19:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f07eb18477c11ea96b4971f55a8d7ee5 SHA-1: 7461e18f1c5e6b5dfc84c6ab217a1b6bc4acef41 SHA-256: 4d5bf303e6b6ed3dc193125308fce57bb182ba255eaa41d8c85089931a3d3e67
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=life+is+strange+comic+book+online PDF link annotation
    • https://lonofajizol.weebly.com/uploads/1/3/5/3/135389348/1670378.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424043/normal_604184a307091.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376362/normal_6047de62d67b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473388/normal_5ff0f68b4d48e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469126/normal_5fd89ecc0d0f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449184/normal_5ff867fd77774.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373770/normal_5fccc0b9962ac.pdfIn PDF document text
    • https://xuxudufekew.weebly.com/uploads/1/3/0/8/130873992/7827586.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415739/normal_5fe7950ea96aa.pdfIn PDF document text
    • https://takoremitivo.weebly.com/uploads/1/3/0/7/130738963/dowefebezuz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380876/normal_5fe54fb14b31e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/procreate_for_ipad_pro_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3aa0fc0-aa69-4747-ada7-a7ff2ebfed9c/broken_man_meaning_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54a11f6c-ddca-40ed-8053-412056f5c902/cules_son_los_sntomas_de_un_odo_inflamado.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/benefits_of_ipads_in_the_classroom_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/cancel_la_fitness_membership_cancellation_form.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/gubipavewenajemisom.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/26015196857.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/1881431479.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3afe6917-4e00-4e6b-bb67-7fd6fb1029c4/what_is_the_stanza_of_a_poem.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/80321052064.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/662084b1-bbcb-46ba-b207-662f9ed12cbf/will_wild_dogs_attack_humans.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEF 5136 bytes
SHA-256: 08af661f7895e89627c2863738b27112c9d079a9c60de92129b5d4ee5f4ba3c4
font_01_sfnt_off00010d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D4A 10624 bytes
SHA-256: 9e8b031ce140ec20238108b32ddb623029e1f99327a0b1c188ab05b3d46d3031
font_02_sfnt_off000131bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131BB 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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