Malicious PDF — malware analysis report

Static analysis result for SHA-256 72772e867fd2a984…

MALICIOUS

PDF

76.9 KB Created: 2021-03-14 13:01:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cac6d12794a63424271c85ba6b0243f6 SHA-1: d35395352725d9757be9cd6a601d5f9514afb1ce SHA-256: 72772e867fd2a98422e6bc6408ba241e55b06e2b35aeacc3d116fc97c3845de4
136 Risk Score

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 multiple suspicious URLs, with one specifically highlighted as an invisible link lure pointing to a domain that likely hosts a phishing or malware payload. The document body, though heavily obfuscated, suggests a lure related to downloading a book, a common tactic for phishing or malware distribution.

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://golowaki.ru/wix?keyword=gut+and+psychology+syndrome+book+pdf+free+download
    • http://fegivate.medianewsonline.com/62084284331.pdf
    • https://nitevugumosu.weebly.com/uploads/1/3/4/5/134526644/750780.pdf
    • https://cdn.sqhk.co/jatizaru/iiyuV2y/clash_royale_stats_download_windows.pdf
    • https://polalakenasi.weebly.com/uploads/1/3/0/8/130813885/xoxeputak.pdf
    • https://vovasodakujex.weebly.com/uploads/1/3/0/8/130874601/nagar.pdf
    • http://tujijamutibe.sportsontheweb.net/are_amana_dishwashers_good.pdf
    • http://my-favshopc.online/49704180652m80he.pdf
    • http://com-login8.xyz/general_organic_and_biological_chemistry_book_answersmltms.pdf
    • http://lasleymarkt.ru/sub_zero_refrigerator_prices_36_side_by_sidevfwja.pdf
    • http://xofelivigavas.mywebcommunity.org/kazapotit.pdf
    • https://cdn.sqhk.co/makulowujip/igigieG/xadiborumere.pdf
    • https://static.s123-cdn-static.com/uploads/4500911/normal_5ff2890b3687f.pdf
    • http://famozosivupiwij.sportsontheweb.net/95826117170.pdf
    • https://xisofapetuv.weebly.com/uploads/1/3/4/7/134747578/1901272.pdf
    • https://cdn-cms.f-static.net/uploads/4502464/normal_601420e2f3e00.pdf
    • https://cdn.sqhk.co/soxesemu/hjLidjA/turitudaxujugisapetawef.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rebomedug/wirasotenakumuwo.pdf
    • http://pavabiza.atwebpages.com/49025679862.pdf
    • https://s3.amazonaws.com/sitok/geometry_and_measurement_worksheets_grade_5.pdf
    • https://s3.amazonaws.com/zategafozasiru/2158657496.pdf
    • https://s3.amazonaws.com/didowugorokirug/kazolasumatagogomeru.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec09.bin
c68c8523f1923a3fc46f47d7dc89e3dc58be06de5ab8a7cc223d0f7edff2dc8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC09 5996 bytes
font_01_sfnt_off00010061.bin
f1c256258376b9b30682d446cc0911379f758265b768634cb48dcb3d5c90c66c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10061 10492 bytes

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