Malicious PDF — malware analysis report

Static analysis result for SHA-256 e12b7551bcae6829…

MALICIOUS

PDF

67.5 KB Created: 2021-01-26 23:43:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: c0bc1d7571467e5d36ce8d2c53e2063d SHA-1: 07cfaf91dc67d65c01bc67acc7940fb9fadc84c0 SHA-256: e12b7551bcae6829509f59c2054af723e809fe4c3a84e43cab397afe42b4e540
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://baarspo.ru/123?utm_term=dao+tin+lanh+tieng+anh+la+gi PDF link annotation
    • http://homebig.space/city_of_houston_tickets_and_warrants8m5xq.pdfIn PDF document text
    • http://zoo-taxi.site/stative_and_action_verbs_list952b0.pdfIn PDF document text
    • https://sutapupimode.weebly.com/uploads/1/3/4/6/134615637/7034e2a.pdfIn PDF document text
    • http://mivetys.xyz/27212361121yao45.pdfIn PDF document text
    • http://grantmedica.ru/durobawo6cnnv.pdfIn PDF document text
    • https://zusavakaki.weebly.com/uploads/1/3/0/8/130815140/8239250.pdfIn PDF document text
    • https://pajejasebuwosiw.weebly.com/uploads/1/3/0/8/130813778/zuvelerimizob.pdfIn PDF document text
    • https://gavuzolarot.weebly.com/uploads/1/3/4/4/134458525/kakidejepa-kutazidowafag.pdfIn PDF document text
    • https://jatilupek.weebly.com/uploads/1/3/4/4/134491857/3579314.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/tujeviwakirawu/46007199729.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/tablighi_bayan_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/76125341507.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/ocarina_of_time_walkthrough_n64.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/bmp180_module_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/47259701228.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_off0000cad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD4 4672 bytes
SHA-256: 2abd9b024ae5fa563d84d583e961cb0308f2ad0cde79f2c07d4a2fbc2f805d21
font_01_sfnt_off0000daba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABA 11728 bytes
SHA-256: d5d766594098f895097125c3b5ebe8887fe12fba10f6e154857dd8382af17cbb