Malicious PDF — malware analysis report

Static analysis result for SHA-256 169cb93f81cf06ad…

MALICIOUS

PDF

81.6 KB Created: 2021-04-20 01:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 65e0b40b69948f51b5c7d61236acd2cb SHA-1: 0d9b34e6a9762e8f2fe626df0a94de006b6a39f4 SHA-256: 169cb93f81cf06adae7803f5ba30f7fd8a695a5aca2071e1f394bb88a967df89
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains and employing UTM parameters, indicating a phishing or link-farming scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://lozipotod.ru/strik?utm_term=oracle+sql+case+and+count PDF link annotation
    • http://idealicaitaly-ufficiale.site/60154134862524ul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381297/normal_5fccfd29685bc.pdfIn PDF document text
    • http://wildboost.club/youtubers_nip_slip9ctxg.pdfIn PDF document text
    • https://resawipodejevi.weebly.com/uploads/1/3/0/8/130814711/eb9e0c65a69f.pdfIn PDF document text
    • https://buvitefano.weebly.com/uploads/1/3/4/1/134131500/laluralowumirozipuv.pdfIn PDF document text
    • https://cdn.sqhk.co/worenora/d0iijfi/battletech_dragon_fire.pdfIn PDF document text
    • http://strgb2.ru/dufijixerabinixifurusuwurj439c.pdfIn PDF document text
    • https://cdn.sqhk.co/dogutadova/gJ3jiih/splashtop_can_t_login.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383132/normal_6068221733f89.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454436/normal_5ff21bd4c691f.pdfIn PDF document text
    • https://cdn.sqhk.co/goxejake/QxZhbja/xatamuwigejuzelubavazab.pdfIn PDF document text
    • https://wadasowodasi.weebly.com/uploads/1/3/5/3/135316150/tejebavu.pdfIn PDF document text
    • http://crysety.xyz/mini_spray_dryer_b-_290_manualn2ncx.pdfIn PDF document text
    • https://cdn.sqhk.co/bawivurolut/jdjgCja/atingir_meta_google_sheets.pdfIn PDF document text
    • https://mogoribomos.weebly.com/uploads/1/3/4/2/134266362/ligobepopigap.pdfIn PDF document text
    • https://cdn.sqhk.co/lexijunibul/E12hdhe/bopepidufagexemopibop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b38a5c3-fda3-4565-b2ed-24c08fc0ef47/99689366803.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/carplay_android_head_unit.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/what_does_equus_mean_in_latin.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/33617104197.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d79da7f-ee30-42ca-8256-1902f01c2614/what_are_the_7_habits_of_effective_leaders.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/64780847911.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_off000101dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DC 5084 bytes
SHA-256: db51ed79a25651da8543298252df15f6c0eef20bab434ecd58dca8fa8baa482b
font_01_sfnt_off0001132c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1132C 11204 bytes
SHA-256: 24ad7515b8d3efe923f194374e1ba5fdd59852af3c0bd7213182721879c38e45

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