Malicious PDF — malware analysis report

Static analysis result for SHA-256 38780bc4c1137b2f…

MALICIOUS

PDF

71.2 KB Created: 2021-09-19 10:34:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d120803a20595df300d1fca1aedb41d2 SHA-1: 23012ec297cff3f900766b18096b5c2054d97583 SHA-256: 38780bc4c1137b2f0d9e14c6a2a97ec1881c0dae93225e368a0ce580a8578585
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for exploiting PDF vulnerabilities or initiating malicious actions. It also features numerous external URIs, including one pointing to a raw IP address, suggesting a redirection or download mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://drafthe.ru/uplcv?utm_term=gta+5+super+jump+cheat+pc PDF link annotation
    • http://kmsenior.org/file/files/fidetope.pdfIn PDF document text
    • https://mimpiindah2.com/contents/files/jolesamekuwivutevawoleraz.pdfIn PDF document text
    • https://fokusmedia.com/images/uploads/detufuwidonanixip.pdfIn PDF document text
    • http://ibsdhc.hpds.work/ecdemo/web/js/ckfinder/files/files/15285820401.pdfIn PDF document text
    • https://palet-school.com/files/files/xijopetodixiwulotedon.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/70585127230.pdfIn PDF document text
    • http://kibunajcc.com/ckfinder/userfiles/files/78343399119.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/68526629195.pdfPDF link annotation
    • http://studiofantino.it/userfiles/files/figagukezafivuvetixi.pdfIn PDF document text
    • https://pleasanton.com/wysiwygfiles/file/81093825669.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/bedag.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/lcea22sqn9r6301husjrbeiedq/35551683055.pdfIn PDF document text
    • http://miroslaws.com/ckfinder/userfiles/files/purubujepeludofunog.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/mevunegowororosijafipi.pdfIn PDF document text
    • https://cowik.pl/upload/75151851642.pdfIn PDF document text
    • http://motoren-adachi.com/js/upload/files/82334350562.pdfIn PDF document text
    • http://teifsepahan.com/files/file/19309613059.pdfIn PDF document text
    • https://oncetrabzon.com/resimler/files/kafuxerugipu.pdfIn PDF document text
    • http://mobilenmr.com/files/files/27854141104.pdfIn PDF document text
    • http://pkpneu.cz/userfiles/file/jowenuwonozomexisomi.pdfIn PDF document text
    • http://www.taxivanclass.com/uploads/ckfinder/files/selenapusafofewiti.pdfIn PDF document text
    • https://ymy-tea.tw/upload/files/rezijilurofimana.pdfIn PDF document text
    • http://paulbwatkinslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/86182960386.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b51b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB51B 10680 bytes
SHA-256: e7ef5e0464bc5b7be9bf5878ed8a3611785c2e1b651019f80f25629a644075dd
font_01_sfnt_off0000cdbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e5ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CE 16024 bytes
SHA-256: 959c82c25538d148de327038ed6cb400eed58a08d77e0ec678187a6bf62715c5