Malicious PDF — malware analysis report

Static analysis result for SHA-256 417969fda509955b…

MALICIOUS

PDF

84.1 KB Created: 2021-02-28 19:12:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e30c2858de04dc7ca3745b17e96e9465 SHA-1: 1b5f1615996074a5df879c7c292daf2347a6f83c SHA-256: 417969fda509955b17d4fd8633c19a294b9bc04891560240a34108c27613eb89
156 Risk Score

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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://jottigo.ru/123?utm_term=twilight+saga+piano+music+mp3+download PDF link annotation
    • https://pifujikis.weebly.com/uploads/1/3/4/8/134875168/3280304.pdfIn PDF document text
    • http://wonuwomola.iblogger.org/74402382388.pdfIn PDF document text
    • http://gudelew.mywebcommunity.org/level_of_care_utilization_system_manual.pdfIn PDF document text
    • http://ramosojakapo.iblogger.org/league_of_legends_patch_10.15_time.pdfIn PDF document text
    • https://xovuxajewilim.weebly.com/uploads/1/3/0/7/130775567/xupiw.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/27334976384.pdfIn PDF document text
    • https://botosedasirewen.weebly.com/uploads/1/3/5/9/135961685/xevaneset.pdfIn PDF document text
    • http://lawekuxidiwote.22web.org/r_programming_certification_udemy.pdfIn PDF document text
    • https://cdn.sqhk.co/vozeseseber/hzib4ib/applock_fingerprint_pro_apk_2019.pdfIn PDF document text
    • https://pezimanazeto.weebly.com/uploads/1/3/5/3/135309923/muvikekufuzusuze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/43920609200.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/acumen_sentence_formation.pdfIn PDF document text
    • http://mutexuwe.epizy.com/dubadu.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/wetoxadipasovibewanat.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/65514617436.pdfIn PDF document text
    • http://niwuzowebod.epizy.com/potej.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010aef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEF 5596 bytes
SHA-256: bc0c3cf8adab6c6f2a4c66bc721708d5718d59fb020f689e28af93782d70a89f
font_01_sfnt_off00011de7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE7 11128 bytes
SHA-256: adb5a82409b9df0322cc919f429c307ce3c2515c6f7871a10b499bfeb4e509fb

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