Malicious PDF — malware analysis report

Static analysis result for SHA-256 03e506366e4e4dee…

MALICIOUS

PDF

75.4 KB Created: 2021-04-25 05:40:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0c88d0a41578c56156a9a45ebf8be8cc SHA-1: 9932a380ccb4a40b59128d73c5c8c8dfd1579dad SHA-256: 03e506366e4e4dee4aab03f855138c9597483c44284530c22b69c1745a96d5cb
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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/strik?utm_term=how+did+america%2527s+role+in+the+world+change+after+ww2 PDF link annotation
    • https://cdn.sqhk.co/jeforije/dtpjfgj/kemerapedizimikolajodoxap.pdfIn PDF document text
    • https://wapavamo.weebly.com/uploads/1/3/1/6/131637186/vepujezivokan.pdfIn PDF document text
    • https://gaxipisida.weebly.com/uploads/1/3/4/2/134267022/6678707.pdfIn PDF document text
    • http://walkover.me/liligegejisamigozozaditoxpz76p.pdfIn PDF document text
    • https://cdn.sqhk.co/posaleren/cjhgisr/38213530710.pdfIn PDF document text
    • http://prostotit.site/843065117679wewz.pdfIn PDF document text
    • https://sizokagijabid.weebly.com/uploads/1/3/4/6/134652394/furewogusakimed-mabit.pdfIn PDF document text
    • https://cdn.sqhk.co/pukefoxer/jbhcegc/77963582771.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/povodijirig/creative_sound_blaster_x_fi_surround_5.1_pro_usb_driver.pdfIn PDF document text
    • https://6c49ff76-e13b-46da-8354-2e633d56f736.filesusr.com/ugd/211c2d_e0bf9858b27046d88bf258333c156a39.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dekogamik/16899584467.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/what_are_the_main_features_of_the_feudal_system.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/minority_report_short_story_vs_movie.pdfIn PDF document text
    • https://9f2a6cc1-6e15-4467-beaa-57274ca996ed.filesusr.com/ugd/78f4c3_ac3c38adb5444f6ea15f2578e095989d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/new_aha_hypertension_guidelines_2017.pdfIn PDF document text
    • https://ed8bc375-cd54-49ab-9ddb-988cb5b2fc3d.filesusr.com/ugd/3f3824_2eb1d8b682684bc3bcd726f3226cc404.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/fozegalakidaxidorez.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/triton_9100_atm_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/40600535014.pdfIn PDF document text
    • https://9e084d23-5bbf-42ad-98e9-fa9200f8584e.filesusr.com/ugd/4f663b_743a5a2351854b7a8d8d6bd3dba85815.pdf?index=trueIn 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_off0000e7e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E3 5652 bytes
SHA-256: 0ac6efef0201112532650c31a1172522faeefa407b0cb4c19e992e30f9b7cefd
font_01_sfnt_off0000fb0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0C 10876 bytes
SHA-256: 31424d23f93b5a153755357ee6b594470473c03fc525057030a2f905265f5b16

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