Malicious PDF — malware analysis report

Static analysis result for SHA-256 65627dca270f4cc7…

MALICIOUS

PDF

76.9 KB Created: 2021-03-01 23:09:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c73117b28abd9ec240d55d0593bccef SHA-1: 1bdde64a7660e851d709503c6deda3debe96dcc7 SHA-256: 65627dca270f4cc7c2da77d7a15754cf48188f155a50752422db7d08a818977e
154 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to known malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, suggests a lure related to downloading software. The ML classifier and ClamAV detection further confirm the malicious nature of the file, indicating it's likely a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/aws?utm_term=windows+7+ultimate+32+bit+torrent+download
    • http://potawuzaj.medianewsonline.com/76437791900.pdf
    • http://idealica-italy.site/wuwutokofwacqe.pdf
    • https://cdn-cms.f-static.net/uploads/4380210/normal_5fda06afdd2e8.pdf
    • https://cdn-cms.f-static.net/uploads/4486565/normal_602607e7d5a00.pdf
    • http://zuvels.xyz/67970956535nqswq.pdf
    • https://cdn.sqhk.co/fujotojaxob/8Nbshhj/56749038576.pdf
    • https://cdn.sqhk.co/kigaratak/UChjQ9e/30779491561.pdf
    • https://cdn.sqhk.co/visesefider/DQPKhht/29369998986.pdf
    • https://cdn-cms.f-static.net/uploads/4383449/normal_600de12e89075.pdf
    • https://cdn.sqhk.co/varaxupumami/jjK7j0t/vivijoxesijizowezajaj.pdf
    • http://idslim-italia.site/total_knee_replacement_xray_reportho1n7.pdf
    • https://cdn.sqhk.co/borefigux/QidJjiz/no_man_s_sky_multiplayer_powering_the_base.pdf
    • https://cdn.sqhk.co/difigobon/SYegijg/pokemon_go_friends_codes_japan.pdf
    • https://cdn-cms.f-static.net/uploads/4445881/normal_601da80583a42.pdf
    • https://cdn.sqhk.co/sigidezok/c1rEJii/zikixumonexesoj.pdf
    • http://reduslim-europa.site/giluzuvegivubolodixaxeric3j2n.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000f088.bin
a997f8a2ac634c164fa766e07b1306abdad863fae38b1b59a403e4973117865a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF088 5592 bytes
font_01_sfnt_off0001038c.bin
973004034d2e221b7f48970f2f23e86b0e60fa0bc2b419289704c66791f26f24
pdf-font-stream PDF embedded font (sfnt) at offset 0x1038C 10204 bytes