Malicious PDF — malware analysis report

Static analysis result for SHA-256 59c2befd3726bcd1…

MALICIOUS

PDF

74.7 KB Created: 2021-03-22 03:55:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: a00426f6ce3828723b21bb14f687ddba SHA-1: 522eaee0fa699a57398de89a79eb8466b271bb71 SHA-256: 59c2befd3726bcd1917faf7498ce15eeed5b34b1938f28fdd39adc7ec044fbc0
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many pointing to disposable domains and potentially malicious hosting, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8022

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://maypoin.ru/award?keyword=baroque+era+music+pdf PDF link annotation
    • http://shoop-fo.ru/5079163952507c44.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385230/normal_5feef3faaeff6.pdfIn PDF document text
    • http://fallofelin.online/statistics_for_aso_exam8q2ej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451377/normal_6016f4ab473b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370066/normal_601349a6c14d8.pdfIn PDF document text
    • http://grantmedica.ru/big_green_egg_smoked_chicken_breast_recipespovw9.pdfIn PDF document text
    • http://natezaka.iblogger.org/libevasufujibo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374968/normal_60400175d8d33.pdfIn PDF document text
    • http://papotanepif.22web.org/android_auto_system_requirements.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473645/normal_6046a2b16134b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386620/normal_5fe2788571ab0.pdfIn PDF document text
    • http://taxavifosobedul.iblogger.org/71061044179.pdfIn PDF document text
    • http://bioforcecolumbia.site/46734597211yd1bs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380691/normal_605321c1d7d24.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bekokutiwafodi.epizy.com/physiology_by_a_k_jain.pdfIn PDF document text
    • http://roruvavaderej.epizy.com/business_environment_book_for_bba.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/44785543056.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/wrong_buzzer_sound_effect_free.pdfIn PDF document text
    • http://midabufab.rf.gd/72249734555.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/konomuvomovunezanatebese.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/zawifegabix.pdfIn PDF document text
    • http://kunibenurupamiv.rf.gd/62633301453.pdfIn PDF document text
    • http://fadakivok.rf.gd/45998272585.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10500 5140 bytes
SHA-256: b270f2f35987bd901daf6211c798648cedb493c000ea901487f5557474c93745

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