Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6097573757120cb…

MALICIOUS

PDF

71.8 KB Created: 2020-11-10 21:51:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 7dd874ee4e8dc65513580cc10a010fdc SHA-1: 10a3b7642df8297430544ea2004976aaa893cacc SHA-256: e6097573757120cb4ec1a939bfcb026bb7e98e06f128b2cf2c6696cbc6290f6f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with one pointing to 'trafffe.ru', suggesting a phishing or malware distribution attempt. The PDF structure and embedded content are consistent with attempts to disguise malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/aws?keyword=chief+legislator+barack+obama PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417824/normal_5f9e4a78f25ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402032/normal_5f9ecd50755f9.pdfIn PDF document text
    • https://lopinelu.weebly.com/uploads/1/3/4/3/134369173/8724414.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/fopalew/medical_certificate_format_for_admission.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/gizenifekotopu.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/wativunixonemixajabag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/932d18bb-efc6-407e-b1f8-126607cb8b0a/58675919582.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3246271d-d14c-4171-b94a-b8a515443972/94076310675.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da273fa4-4f40-4372-bf16-9ef10145e280/nikaxotewujuku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/275a1523-9f90-44a1-8a8e-ce82540e0f13/finding_nemo_movie_download_tamilyog.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/12818999472.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62433588-e234-4f6b-a797-aa5ca9bada43/56632707088.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_off0000ce8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE8D 5204 bytes
SHA-256: 5031771290624921bb64ae665205b9893d1fea18c57d42672651e0418d29bdf7
font_01_sfnt_off0000e051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE051 10536 bytes
SHA-256: 5618183497da10856b79c7e4f39a33358de61495f2ebb6a63e0c7bd8e3aef13e
font_02_sfnt_off00010475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10475 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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