Malicious PDF — malware analysis report

Static analysis result for SHA-256 a360f6b4745c11a2…

MALICIOUS

PDF

73.6 KB Created: 2021-02-13 05:07:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: dc3403000057d1a5e9335e5cb738cbea SHA-1: fa0b6fb0a331e815a197f80ef1eb559fa61ec6a4 SHA-256: a360f6b4745c11a22d7fd6682806897f49f0af2c14e5e86b466e5ecab8c80104
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/123?utm_term=pharynx+vs+larynx+function PDF link annotation
    • http://romabeveseruzor.22web.org/battery_monitor_android_phone.pdfIn PDF document text
    • https://vetasokimatajed.weebly.com/uploads/1/3/5/2/135296406/banizakeb-nimej-momopasowixoli.pdfIn PDF document text
    • https://sovuzozasofebod.weebly.com/uploads/1/3/4/3/134343281/tamipovedidekeg.pdfIn PDF document text
    • https://zoliparudoluja.weebly.com/uploads/1/3/4/6/134662317/5081977.pdfIn PDF document text
    • https://sadupomojafex.weebly.com/uploads/1/3/0/7/130776775/rifumagi_taburopotizi_xosuga.pdfIn PDF document text
    • https://votorivoxezi.weebly.com/uploads/1/3/4/0/134095847/687634.pdfIn PDF document text
    • http://italystore.pro/significance_of_solubility_test_of_bitumentnxei.pdfIn PDF document text
    • https://geworusidexaj.weebly.com/uploads/1/3/5/3/135306562/128628.pdfIn PDF document text
    • http://reduslim-shop.site/hallelujah_to_the_lamb_choir_sheet_musicfa2te.pdfIn PDF document text
    • https://metiwefipit.weebly.com/uploads/1/3/1/4/131406934/miruzorotemov_bodifiduw_jepukeni.pdfIn PDF document text
    • http://veritebadisifif.iblogger.org/16443893576.pdfIn PDF document text
    • http://7gusevshop.space/dan_the_man_josie_fanart4v3kh.pdfIn PDF document text
    • https://dutizadip.weebly.com/uploads/1/3/4/8/134889078/xikigiguv-zusigexunujof-gixanasuw-tupafegex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bedekopezedegej.rf.gd/lirik_lagu_batak_mandailing.pdfIn PDF document text
    • http://dofenepebasep.epizy.com/nuweloxo.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_off0000df32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF32 5200 bytes
SHA-256: 5c34e609abc1d2e307cd75ec4f6dc0264d89adcc23a1629f977347b24915a513
font_01_sfnt_off0000f0f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F2 12112 bytes
SHA-256: fe8831c2706f21c7c39d21031a52bae8e78e3455b59650bb4483a0c051bf6cab