Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb2169a327fa3354…

MALICIOUS

PDF

98.9 KB Created: 2021-01-23 23:02:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 07d593b0b1933a74ed268ed7e3814c6a SHA-1: 7434a10478c15d43874b089b1a28da2128d5ed4b SHA-256: eb2169a327fa335427fd6c4af7fd2f8313fad6bc34ca1d582cc659ae46a4fbca
156 Risk Score

Malware Insights

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

The sample is a PDF document that contains a large number of external links, many of which point to PDF files hosted on file-sharing services. This behavior is indicative of a link farm or a phishing campaign designed to direct users to malicious websites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://traffnew.ru/123?utm_term=us+history+regents+june+2019+study+guide PDF link annotation
    • https://xosebabonewita.weebly.com/uploads/1/3/4/6/134613761/9808920.pdfIn PDF document text
    • https://diwesosun.weebly.com/uploads/1/3/2/6/132695938/xabinene-gujoxowe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494165/normal_5ff614b8e0d3b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445749/normal_5fdd27e469c80.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487897/normal_5fe4a212c84a6.pdfIn PDF document text
    • https://dapevorejux.weebly.com/uploads/1/3/4/6/134695165/tepizegomog-jekibeza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467318/normal_5ff0ce9ef247a.pdfIn PDF document text
    • https://lirujisigibat.weebly.com/uploads/1/3/0/8/130874608/51cf4e7e2f1.pdfIn PDF document text
    • https://cdn.sqhk.co/gujuvizaja/3hgjdie/crazy_golf_near_me_open_now.pdfIn PDF document text
    • https://cdn.sqhk.co/sidogorego/DhfFidG/voice_changer_for_pc_xbox_app.pdfIn PDF document text
    • https://webimilosajepi.weebly.com/uploads/1/3/4/8/134859137/6c1ad4.pdfIn PDF document text
    • https://bivapere.weebly.com/uploads/1/3/4/6/134689139/7bee91e2df30f0.pdfIn PDF document text
    • http://bunakevogipo.iblogger.org/tudo_sobre_piscicultura.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405907/normal_5ffab40288f8d.pdfIn PDF document text
    • https://famimiketavow.weebly.com/uploads/1/3/0/8/130873946/2be113d5e998.pdfIn PDF document text
    • https://neriborotarisim.weebly.com/uploads/1/3/4/3/134345051/vowegolizufelul-mubiwagexufavo-tulisej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376096/normal_5fefe0d9e7837.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
    • http://lojetewope.epizy.com/rejubetelerepoguj.pdfIn PDF document text
    • http://nawexox.epizy.com/bookcase_platform_bed_queen.pdfIn PDF document text
    • http://manutilo.epizy.com/lilesi.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_off00013815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13815 5380 bytes
SHA-256: 17b224404cc49f960a1d83fa72a65c7730c3a7d847938aa740eab610cdeff835
font_01_sfnt_off00014a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A70 11088 bytes
SHA-256: 053220a7073860c0bbb79fb1a38dd5a3a3000edcd7e96eda8b945e3c6fd3e1cf
font_02_sfnt_off00016fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FB3 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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