Malicious PDF — malware analysis report

Static analysis result for SHA-256 e596d90bbd91ede1…

MALICIOUS

PDF

68.3 KB Created: 2020-12-16 20:31:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 70a9ee7c28e8d0f01c98c7d8d2f739d9 SHA-1: ec85d8ee4b17101ee303df168544fc51f19e5c9c SHA-256: e596d90bbd91ede1beabb7ff4d422656302ff27cddcba6897961261ecc0ffde9
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The heuristic firings indicate this is a link farm designed to direct users to potentially harmful sites. While no scripts were extracted, the presence of numerous external links suggests an attempt to lead users to phishing or malware hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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.
  • 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://gettraff.ru/strik?utm_term=poemas+a+la+mujer+mas+hermosa In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385887/normal_5fa969cfeafd6.pdfIn PDF document text
    • https://rupasofo.weebly.com/uploads/1/3/4/8/134892789/temisamav-tekolal-jilupefiwez.pdfIn PDF document text
    • https://wozibasibif.weebly.com/uploads/1/3/4/8/134868806/21e6ac777c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365652/normal_5f95da07ae0bb.pdfIn PDF document text
    • https://tunupufimudodo.weebly.com/uploads/1/3/4/3/134324073/siditogawi-lelat-natetodubuluxop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375705/normal_5f9c1bd227dfb.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/tetazino/62071131666.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/city_buses_information_in_hyderabad.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/zibixozefijaredeba.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/best_offline_war_games_for_android_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/94471254007.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/97860380469.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/zufinemajedereguwesuwuma.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_off0000ceb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB0 5000 bytes
SHA-256: 2c96beae6fe059817d9730f29417599094e55a3a1213b53c7177d221c09d7a47
font_01_sfnt_off0000df82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF82 10820 bytes
SHA-256: 7be1570c32241c416cbb9b0a41973b63f4a44ef484a0fc3e70ecdbc7f9a974f6

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