Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba8820dae8502ff9…

MALICIOUS

PDF

72.4 KB Created: 2021-05-24 22:16:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 62e6fc0652d96161b4d389a619e9b118 SHA-1: 7508bd647743ef73554e18fd475dcdb04f239295 SHA-256: ba8820dae8502ff922ee0f555628ace43954115562cc1dd40aeedf9af29a9cb0
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 0.9996

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://zajinet.ru/strik?utm_term=biozone+ib+biology+student+workbook+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427091/normal_603f8d3ea87a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480880/normal_6029dc5559a7e.pdfIn PDF document text
    • https://jubekufolofifi.weebly.com/uploads/1/3/4/5/134593927/5969248.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484364/normal_6038e213a41e8.pdfIn PDF document text
    • https://voxudipuxun.weebly.com/uploads/1/3/5/3/135319737/1101009.pdfIn PDF document text
    • https://voromelub.weebly.com/uploads/1/3/4/8/134872571/vuzux_bimaxuvemot_bigarozafo_xeniwizu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471488/normal_5fec3863befdc.pdfIn PDF document text
    • https://losujawidejope.weebly.com/uploads/1/3/4/3/134310111/tizatodowegufez.pdfIn PDF document text
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/2484834.pdfIn PDF document text
    • https://wajusozoxedaxu.weebly.com/uploads/1/3/4/2/134235608/9be838f16e8a442.pdfIn PDF document text
    • https://lekopejener.weebly.com/uploads/1/3/5/3/135323345/8807519.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/tosego/62512724937.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/before_the_rains_full_movie_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/46085902123.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/jemuxonedewenulokugila.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd720300-a0e0-40b5-81a5-419c4f49f8bd/ford_mustang_gt_horsepower_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/litasodid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2621d8e-346c-494b-82e8-aec1a41bc666/zikenezepokosabu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a321d60-8a8d-4083-860d-1bc65db244bc/mejeloke.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/popapatabedopikudop.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxefemebidaz/how_many_carbs_in_a_sonic_breakfast_toaster.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/83157256341.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD996 5496 bytes
SHA-256: 4442aee6b22d2bc70d8e8b5fa135f40b78551ca9e8e8b847a2982621a0eb5bd3
font_01_sfnt_off0000ec86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC86 11780 bytes
SHA-256: 1bea65d33cb976b2a16846c2f7a511b16065d79cfb6e3a1c650544d8344aa32b

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