Malicious PDF — malware analysis report

Static analysis result for SHA-256 48e08af0484bb44a…

MALICIOUS

PDF

74.1 KB Created: 2021-01-11 11:41:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8fd7c1677337c7fc1669e702c38d4d0e SHA-1: ad41d7d8838cb88cf272c4ca030deaec591f87ac SHA-256: 48e08af0484bb44aaead2a63351c95ae7b78fd0be190dd2781a10e74787bb7f9
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 0.9998

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://traffine.ru/aws?utm_term=bekaboo+episode+5 PDF link annotation
    • https://wasinipexo.weebly.com/uploads/1/3/4/3/134362371/1689843.pdfIn PDF document text
    • https://pujuwofox.weebly.com/uploads/1/3/4/8/134882524/5154646.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387565/normal_5f90874baff8b.pdfIn PDF document text
    • https://site-1167955.mozfiles.com/files/1167955/zezopofavozewafifokabu.pdfIn PDF document text
    • https://site-1175981.mozfiles.com/files/1175981/sales_order_management_software_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454167/normal_5faa71e24c7a6.pdfIn PDF document text
    • https://site-1172862.mozfiles.com/files/1172862/13044851849.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383450/normal_5fba213f0dfa4.pdfIn PDF document text
    • https://site-1178784.mozfiles.com/files/1178784/sefepexabeloweloz.pdfIn PDF document text
    • https://site-1178778.mozfiles.com/files/1178778/44189549556.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/nisoxow/dutufafasul.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/the_hunting_party_linkin_park.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/50619274827.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/media_creation_tool_windows_10_64.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/call_app_apk_hack.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/making_verb_agreement_with_compound_subjects_worksheets.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B0 3620 bytes
SHA-256: 72e594787b3081ac7db50871d4cd40b32686ca584b8772c8d03f66ccbdd41221
font_01_sfnt_off0000e0a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A1 5200 bytes
SHA-256: ed0a0706004f5f4e7675427063359298d263f062e2d32dfa3bfd657bde9cf804
font_02_sfnt_off0000f264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF264 12052 bytes
SHA-256: 92f525e44f0afe8d9db8fd10bd420de4a416a394fec6b30efaada9052616e515

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