Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca1d3f3d22ae02b6…

MALICIOUS

PDF

79.9 KB Created: 2021-03-24 08:40:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 472dc818747838f12645f0a9f27259cc SHA-1: 28382e03ddba21530c0fe5f2d7798caf8d2afe50 SHA-256: ca1d3f3d22ae02b66017202d507065bf91e7e7637c6dff7ce69bfea7a0cde109
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of external URIs and a 'download button' heuristic suggests the document is designed to trick users into downloading a secondary payload. The document body, though heavily corrupted, contains references to 'Zombie catchers pro apk', further supporting a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dugedepap.ru/123?utm_term=zombie+catchers+pro+apk
    • http://webdefilmizle.com/tipegopili40n6j.pdf
    • https://cdn.sqhk.co/gapekozuwa/un09Xgh/bavuni.pdf
    • https://cdn-cms.f-static.net/uploads/4374196/normal_6048ce97bb46d.pdf
    • https://cdn.sqhk.co/rilowikapaz/FjfbZ5C/13456925633.pdf
    • https://cdn.sqhk.co/letopoto/geijrgf/slingshot_vs_zombies_mod_apk_no_reload.pdf
    • http://form-lnstagramverificationbadge.com/kimexezapulatejomoweksjfc9.pdf
    • http://hookup754.fun/55007631113ej48p.pdf
    • https://cdn-cms.f-static.net/uploads/4485014/normal_60222ec859261.pdf
    • https://cdn.sqhk.co/sabewapolire/gjhgewW/17065086449.pdf
    • http://cashbackmoney.info/66163251529zjfcp.pdf
    • https://cdn-cms.f-static.net/uploads/4371553/normal_5fe6178379eed.pdf
    • http://moscow-siberian-force.online/camille_paglia_az_quotesqvviz.pdf
    • http://bilabugova.iblogger.org/subordinating_conjunction_exercises_with_answers.pdf
    • https://cdn.sqhk.co/tamurikubol/aier0pN/membeli_token_listrik_di_shopee.pdf
    • http://titanovyi-filtr.ru/quantum_computing_books_20192374g.pdf
    • https://cdn-cms.f-static.net/uploads/4420434/normal_602722f2a992e.pdf
    • http://kdghy.online/zekibez89f9.pdf
    • http://astropsychology.website/60665503606uzdpe.pdf
    • https://static.s123-cdn-static.com/uploads/4489414/normal_600024cb00516.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/abec16e6-528f-4826-a89f-5f4acdb349f4/31450616361.pdf
    • https://uploads.strikinglycdn.com/files/739e1e43-c3b6-4bdf-8b7e-09d506ff6e99/65807481157.pdf
    • http://firiveperoju.epizy.com/47608561280.pdf
    • https://uploads.strikinglycdn.com/files/9bf4f826-d745-4763-842a-c84074376d5f/canon_sx160_is_digital_camera.pdf
    • http://misowajonubajoz.epizy.com/ronifafajovade.pdf
    • http://fepapasofefo.epizy.com/equivalent_fractions_worksheet_2.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_off0000eec0.bin
5d0f149a5db3779c070caa16c60c3a12e4b44a33fd32d41d184427d1f456913e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC0 5300 bytes
font_01_sfnt_off0001009d.bin
c11ce9cb2d08aa3c6db84fb4af967e453bfdbb7f36bfc2b4f5f8b9187c89f017		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1009D 22560 bytes

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