Malicious PDF — malware analysis report

Static analysis result for SHA-256 017628c755147554…

MALICIOUS

PDF

74.9 KB Created: 2021-02-19 13:02:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2b76f8b3c318e00cdacbf2193963f147 SHA-1: 5ffa22b3be870f073b643307ec7db4102a39b4ed SHA-256: 017628c75514755468fd93af3cf494c9c7cc3a128cae79d11141d12373700ee9
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with one specifically identified as a potential phishing lure related to child development. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, likely for phishing or malware distribution.

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
  • 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://druttle.ru/strik?utm_term=what+are+milestones+for+a+2+month+old PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4387566/normal_5fe276a61e653.pdfIn PDF document text
    • https://piborubaladedos.weebly.com/uploads/1/3/4/7/134764427/zajenegal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391008/normal_5fd03e3906c34.pdfIn PDF document text
    • https://cdn.sqhk.co/nodewanase/i5fjciw/song_ringtone_free_download_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/fupipevu/Qjdijif/bedixarunabox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487206/normal_5fe039b4cd11b.pdfIn PDF document text
    • http://figojusu.iblogger.org/taxes_subsumed_under_gst.pdfIn PDF document text
    • https://dugigoje.weebly.com/uploads/1/3/4/7/134754128/7610562149eb6.pdfIn PDF document text
    • https://xewixubigikuj.weebly.com/uploads/1/3/4/8/134892453/308407.pdfIn PDF document text
    • https://gitodaxip.weebly.com/uploads/1/3/5/9/135960033/879164.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445739/normal_601240de7b697.pdfIn PDF document text
    • https://cdn.sqhk.co/gajeneset/hjNhedE/vedutinifib.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/punurum/practice_exams_wastewater_treatment_operator_certification.pdfIn PDF document text
    • http://mezajuwobit.rf.gd/calendario_2019_festivos.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/21774400618.pdfIn PDF document text
    • http://duvugagaxanawag.rf.gd/44201942476.pdfIn PDF document text
    • http://bexotomilobawa.epizy.com/1387461497.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/mumavuvexelodebutuk.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/beyond_compare_trial_version_free.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_off0000e772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE772 5292 bytes
SHA-256: e9b6608bb8926e8b5f6d00d0fe2fc49496da18ac308696d24cbb012543d2b74c
font_01_sfnt_off0000f955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF955 10684 bytes
SHA-256: dd7e43764b6c082780edeef7803e22046f17c4f39ca841a8a8bd747adc8eb705

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