Malicious PDF — malware analysis report

Static analysis result for SHA-256 7945c962179e2cc3…

MALICIOUS

PDF

75.5 KB Created: 2021-01-16 03:14:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2ea6cbdda5523f8716bf2a9d0353ff94 SHA-1: 71afc341aa53850b89d5556563f935cb26274478 SHA-256: 7945c962179e2cc3c0fbe51b39a8e5af1fc0b0215c2b7ece6a72a9194eaee6c7
214 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, and it contains numerous links to external websites, indicating it functions as a link farm. One critical heuristic identified a link to known malicious redirector infrastructure, suggesting the primary goal is to redirect users to potentially harmful content or phishing sites. No scripts were extracted, but the presence of numerous external links and the malicious verdict strongly suggest a phishing or malicious redirection attempt.

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://cctraff.ru/123?utm_term=massachusetts+high+school+swimming+state+qualifying+times+2019 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413473/normal_5f991aba3ee43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370275/normal_5fe4f59d04335.pdfIn PDF document text
    • https://cdn.sqhk.co/pasepizut/6IuChj7/hku_philosophy_courses.pdfIn PDF document text
    • https://cdn.sqhk.co/minamojazi/gidjdih/cross_cartoon_in_urdu_2020.pdfIn PDF document text
    • https://gutirupivib.weebly.com/uploads/1/3/4/7/134768574/3899285.pdfIn PDF document text
    • https://xewaxamuroz.weebly.com/uploads/1/3/4/5/134529724/fakosigabivujutexaj.pdfIn PDF document text
    • https://cdn.sqhk.co/fesakesovoka/hwahdhd/maximum_carry_on_size_southwest.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420441/normal_5fc79ef51849f.pdfIn PDF document text
    • https://cdn.sqhk.co/lewivapawo/Oidhaib/break_it_down_country_song.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451561/normal_5ff667c83df06.pdfIn PDF document text
    • https://zafigitelerom.weebly.com/uploads/1/3/4/3/134338481/kotev-jibimoxafe-wonumojimud.pdfIn PDF document text
    • https://cdn.sqhk.co/votojuxosaf/62i8soE/online_shopping_website_design_code.pdfIn PDF document text
    • https://vefenebef.weebly.com/uploads/1/3/4/8/134885139/cf2e5e7b176cc77.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e66e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66E 6004 bytes
SHA-256: f361f17458c75bb2b1cc7b755252ff068e32acdaa49b8904b57e87a0062634cc
font_01_sfnt_off0000faea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEA 10960 bytes
SHA-256: ac140cd1e759dd62a94747cbad002a259a894173373b4d33735ac3f9cc5c7ac4

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