Malicious PDF — malware analysis report

Static analysis result for SHA-256 a68aac3263d6221a…

MALICIOUS

PDF

117.2 KB Created: 2021-02-24 05:59:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 97b191f2b6dcf15eeb4e11c1ed42c621 SHA-1: f2453f6784ab66e477223b21e1b1d8ad047f1abb SHA-256: a68aac3263d6221aa08315650a0964c271da539758e3eac94aed6d5d2f35c3fb
154 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/123?utm_term=what%2527s+a+good+title+for+a+book+about+cats In PDF document text
    • https://cdn.sqhk.co/xewafazuk/fnNjfoo/4946089574.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447497/normal_6026773b8ee35.pdfIn PDF document text
    • https://cdn.sqhk.co/bexoninodag/icjfW2I/gardenscapes_hack_2020_mediaf_re.pdfIn PDF document text
    • https://cdn.sqhk.co/lexaxemiji/gdDaJhd/halloween_costumes_ideas_for_girls.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375197/normal_5fe03dd2c4656.pdfIn PDF document text
    • https://cdn.sqhk.co/wigetoxeveka/usjgehh/dragonvale_dragons_compatible_with_enhancements.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/N7zheYH/galenixugekaratarepoka.pdfIn PDF document text
    • http://heretythere.site/70607785777ed5ij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500429/normal_5fd80740d7460.pdfIn PDF document text
    • http://antonioita.fun/644694560813lmy0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412170/normal_5fd899221c15d.pdfIn PDF document text
    • https://cdn.sqhk.co/jarogofef/b95jcji/tiny_world_apple_tv_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/0hiiiib/86771733481.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rufegojokod.epizy.com/vlookup_two_sheets_excel_2010.pdfIn PDF document text
    • http://tijilidimipep.epizy.com/grim_dawn_do_spells_crit.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17808 5536 bytes
SHA-256: 162e0ac94f0456b3c974b260370c55ac72bfdb22619ddaadbef90fc194dc7ccf
font_01_sfnt_off00018ae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18AE9 11044 bytes
SHA-256: 25e0880052ddecf0b599748f8c2f9e01d3ecdbd399c5457e3f08aab9c2e9d24d
font_02_sfnt_off0001afd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AFD8 16632 bytes
SHA-256: d6aeca2d71d065aeba00d03c50d672d3ba05f186ce264dc70760bb3990d11dd0

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