Malicious PDF — malware analysis report

Static analysis result for SHA-256 01bb89524a6989f2…

MALICIOUS

PDF

73.2 KB Created: 2021-03-22 17:06:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 7e0959bd149c398f30e7d7e0e62004d3 SHA-1: 54634d2220cf060a80886b67315f776d8a41f229 SHA-256: 01bb89524a6989f2aa7ca3263f7fbd7821a612162cdfdfa3f33711392359bcc6
154 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with one pointing to 'jottigo.ru', suggesting it's part of a link farm designed to redirect users to potentially malicious content. The presence of a 'download button' lure and callback phishing indicators further supports a phishing or social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jottigo.ru/award?keyword=financial+awareness+june+2020+pdf PDF link annotation
    • https://pesiwuveso.weebly.com/uploads/1/3/5/3/135392822/kokuxenoko_jakelonod.pdfIn PDF document text
    • https://cdn.sqhk.co/jawefujivi/jbyhjjh/53099746041.pdfIn PDF document text
    • http://realnoe-obshenie.online/how_to_get_splat_dye_off_skiny0lfo.pdfIn PDF document text
    • https://cdn.sqhk.co/difakezil/jgiidvi/dasexusosajozokikotor.pdfIn PDF document text
    • http://j3vnci4.xyz/afghanistan_warub3zm.pdfIn PDF document text
    • https://medofigovur.weebly.com/uploads/1/3/5/3/135316586/296ae6c5097e1c0.pdfIn PDF document text
    • http://pisumuvate.sportsontheweb.net/us_student_visa_interview_questions.pdfIn PDF document text
    • http://vovpomnim.ru/difference_between_pre_testing_and_post_testing_in_advertisinge91ez.pdfIn PDF document text
    • http://pozijuza.scienceontheweb.net/48300005953.pdfIn PDF document text
    • http://uaportal.site/334875022573oo4a.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/bhajchd/37363745568.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/piwanisaj/82941942574.pdfIn PDF document text
    • http://molamizaxe.epizy.com/lakapez.pdfIn PDF document text
    • http://depexezopip.epizy.com/jagerawafizusazuwevus.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/krishna_ki_bansuri_dhun.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/brother_sentiment_tamil_songs_free.pdfIn PDF document text
    • http://rusasawo.rf.gd/98163238126.pdfIn PDF document text
    • http://zudupaxub.myartsonline.com/60068140642.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_off0000dd7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7C 5548 bytes
SHA-256: a506e3a0757961e49bea25b1b357be698924fffe807a51db913b70deb9981977
font_01_sfnt_off0000f07e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07E 10952 bytes
SHA-256: d33316639944b0651ffbc5f0c53e1e065ea4dfd05283e3077651b4b836dd234d

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