Malicious PDF — malware analysis report

Static analysis result for SHA-256 77166f7f122d37ed…

MALICIOUS

PDF

79.3 KB Created: 2021-03-30 11:06:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d0dabfee84630e93eec29b0eb3469509 SHA-1: ce089363b72db6545454a231b7c21f3e84fef088 SHA-256: 77166f7f122d37edd604f346ed36aa7cb0d631bb6577e637be74d84e56e1baa1
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://bologen.ru/award?keyword=creating+conducive+learning+environment+pdf PDF link annotation
    • http://nalodorepuwag.getenjoyment.net/bollinger_bands.pdfIn PDF document text
    • http://wifejopoxakobo.iblogger.org/zivexomer.pdfIn PDF document text
    • http://gamuxiwami.getenjoyment.net/what_to_do_when_nothing_feels_right.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/gj8uyie/vefagifupuja.pdfIn PDF document text
    • https://cdn.sqhk.co/gilisuvunu/f3hbpK4/doctor_assisted_death_ontario_forms.pdfIn PDF document text
    • http://xejopegig.mypressonline.com/31933478966.pdfIn PDF document text
    • http://kewokuxumuzig.medianewsonline.com/24567475744.pdfIn PDF document text
    • https://cdn.sqhk.co/fagojefavap/pidoijc/elder_scrolls_oblivion_alchemy_apparatus.pdfIn PDF document text
    • http://pixilapusir.22web.org/probation_progress_report_template.pdfIn PDF document text
    • https://cdn.sqhk.co/sujubowip/hiiuoxp/84265642885.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://sonupon.epizy.com/23493546090.pdfIn PDF document text
    • https://c751e6e8-0850-424d-b14e-d7ae46260796.filesusr.com/ugd/bc1028_fe7acd130087412aa64d4db5e8934c37.pdf?index=trueIn PDF document text
    • https://05790d5e-93e9-4545-bcc4-99c37f081c18.filesusr.com/ugd/bff4d5_428a0b73aefb487a862879c5dcb25b59.pdf?index=trueIn PDF document text
    • https://761e60ea-5e0e-4c43-b4c2-f6a9045c608d.filesusr.com/ugd/545033_4bf995d0e9c94147b57374cd5dbe124d.pdf?index=trueIn PDF document text
    • http://vigexosav.myartsonline.com/how_to_wear_beats_pro_wireless.pdfIn PDF document text
    • https://0443db59-9f9d-4031-b786-8a5723798135.filesusr.com/ugd/ab62d6_b2ad9be1234b41baac9fe6dc5a39936a.pdf?index=trueIn PDF document text
    • https://3d7c42e8-cad9-4196-8f3c-0f210fd97588.filesusr.com/ugd/1b7c00_aed0145b33bb480a8c43c6020109ba52.pdf?index=trueIn PDF document text
    • http://jokiperone.epizy.com/17249536092.pdfIn PDF document text
    • https://77bac38d-831a-46d6-8f22-d7743fcadc58.filesusr.com/ugd/5b9a87_af24e16f5ecd4c0aa39b306fb51926f8.pdf?index=trueIn PDF document text
    • https://1b2c4efd-c8eb-4b04-b26f-b9154d704720.filesusr.com/ugd/d3758e_4e3255a2ad764bd6a245fc2cea686d2e.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB55 5260 bytes
SHA-256: da0f347962036eeed8bc4354770ef2aa39dc347ccefd6055f74e52ff73096dde
font_01_sfnt_off0000fd2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2C 10768 bytes
SHA-256: 8edb8299fc1c1cc0f17e6d2fc31240c36eadb7e30d3b2a342a6ed5ea25244dfe
font_02_sfnt_off000121ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121AD 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

Open this report in the interactive analyzer, or submit your own file for analysis.