Malicious PDF — malware analysis report

Static analysis result for SHA-256 8044a19b930661d6…

MALICIOUS

PDF

75.0 KB Created: 2021-01-23 10:31:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 30925e41f0362289d56fc3769a9cfbbd SHA-1: e574e4f9684b14433ffcf2fce1f7bf4fee3699b7 SHA-256: 8044a19b930661d6326830b9b19a72e183cbd73fa0250f8bfe70dfe276fc7fee
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and heuristic detections indicating it is a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of a URL pointing to 'traffking.ru' with a 'heart broken song' UTM parameter indicates a lure to a potentially malicious landing page.

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://traffking.ru/aws?utm_term=heart+broken+song PDF link annotation
    • https://site-1183516.mozfiles.com/files/1183516/picaportes_para_puertas_interiores_precios.pdfIn PDF document text
    • http://zakunofukar.iblogger.org/50786099458.pdfIn PDF document text
    • http://luvetikemo.66ghz.com/synonyms_worksheets_for_4th_graders.pdfIn PDF document text
    • https://site-1173205.mozfiles.com/files/1173205/funny_pictures_of_spongebob.pdfIn PDF document text
    • https://cdn.sqhk.co/zufuxirap/6v8ijiM/23737821167.pdfIn PDF document text
    • https://lerorenoj.weebly.com/uploads/1/3/5/3/135390996/4675766.pdfIn PDF document text
    • https://site-1204337.mozfiles.com/files/1204337/gardenscapes_game_for_pc_online.pdfIn PDF document text
    • https://cdn.sqhk.co/zupitefa/fgjACjb/98969077049.pdfIn PDF document text
    • https://site-1246177.mozfiles.com/files/1246177/verutefubujosovom.pdfIn PDF document text
    • http://noxerazomefo.iblogger.org/60425826926.pdfIn PDF document text
    • https://cdn.sqhk.co/gefisodir/gKbUiiv/shogun_assassin_watch_online.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/latufenaw/kudevipivojezajutovevubu.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/bmw_financial_report_2017.pdfIn PDF document text
    • http://renedutej.rf.gd/29293133367.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/48933369305.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_off0000e9da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DA 4988 bytes
SHA-256: 96f69fa419c81b2da248398536e3a95a285cdd5cc85dd6aa57b69e044d726c39
font_01_sfnt_off0000fade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADE 10696 bytes
SHA-256: 8c4afb3d85856b905a2892e17dcf694e5cf2e5df79e6784e698287459d158980

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