Malicious PDF — malware analysis report

Static analysis result for SHA-256 b605f002be93c720…

MALICIOUS

PDF

73.8 KB Created: 2021-02-22 14:34:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6082a97b95c87271b8054dd329e3ae47 SHA-1: 47a1a65d570d3aa2a65a549132cbcd5dbf9ae478 SHA-256: b605f002be93c720131bba27308a938ac62af6720fbafd089164953cc7d2365d
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable hosting and known malicious redirectors, indicating a link farm designed to lead users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to exploit users via malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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.
  • 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://yafferge.ru/aws?utm_term=vampire+diaries+season+1 In PDF document text
    • https://cdn.sqhk.co/xewafazuk/AijicYs/sandeep_maheshwari_ki_new_video.pdfIn PDF document text
    • http://jejunobu.iblogger.org/jerisul.pdfIn PDF document text
    • http://vedakedudeloko.22web.org/69668837141.pdfIn PDF document text
    • https://cdn.sqhk.co/daruluneti/dF55QP2/image_quiz_questions_and_answers.pdfIn PDF document text
    • http://gutufozif.iblogger.org/apttus_cpq_admin_guide.pdfIn PDF document text
    • http://povar2020.site/muzofumv3uzb.pdfIn PDF document text
    • http://deteluwo.iblogger.org/what_does_unconditional_positive_regard_mean.pdfIn PDF document text
    • https://cdn.sqhk.co/navozaxezini/iiIibia/epic_battle_simulator_online_play.pdfIn PDF document text
    • http://winnerslm.space/vuparevujelekojik8ov05.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/jijari/angry_birds_movie_in_english_2016.pdfIn PDF document text
    • http://vowaderisosalel.epizy.com/jikibopowuzaka.pdfIn PDF document text
    • http://gikutixutawax.epizy.com/sagulakegivu.pdfIn PDF document text
    • http://xugivazule.rf.gd/wusasozupatigowav.pdfIn PDF document text
    • http://pimubejat.epizy.com/naludedipetipeteziw.pdfIn PDF document text
    • http://xilorevej.epizy.com/cyber_public_relations_journal.pdfIn PDF document text
    • http://vejabimumen.epizy.com/audible_manager_windows_xp.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/kufuragovisodise.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/ecosystem_worksheets_3rd_grade.pdfIn PDF document text
    • http://lisunamubeso.epizy.com/lowuzevikazekazejumudenu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FC 5088 bytes
SHA-256: d8c5466f92ffd9b3acb5205681ffce3c011f13261bb125c50bafcd95b7fae79d
font_01_sfnt_off0000f838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF838 9980 bytes
SHA-256: b9e0473ad7502a7ecadc339408057f5c231ba4fe3ab66c966962d16e79bcadeb

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