Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe1a4aff074f2c1…

MALICIOUS

PDF

76.2 KB Created: 2021-09-20 06:38:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bcc5dee19e1b46f8f042ce695694f661 SHA-1: 19e143b6c20d0e2b47d89e19b6f844c2c963f2d0 SHA-256: bbe1a4aff074f2c1b9e3f4702c3c8e428472b765d0b56541340a68399fcbf875
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by heuristics as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the structure and URL patterns suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://pileshoppen.dk/userfiles/file/sovifes.pdf In PDF document text
    • https://blogsma.com/files/31833227801.pdfIn PDF document text
    • https://pioneerlift.com/upfiles/editor/files/nazuwubunerevipuse.pdfIn PDF document text
    • http://benhvienlaptop.biz/userfiles/file/sonuxakegufukijaw.pdfIn PDF document text
    • http://scea.edu.mn/ckfinder/userfiles/files/88872370022.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/87864519641.pdfIn PDF document text
    • https://carsen.sk/editor_uploads/system/files/revoposunuwamebaga.pdfIn PDF document text
    • http://netdepphunu.vn/images/userfiles/file/68227445511.pdfIn PDF document text
    • http://produse-zilan.ro/files/54135418040.pdfIn PDF document text
    • http://euskararenginkana.eus/files/galeria/files/49085857334.pdfIn PDF document text
    • http://timnhanhonline.com/upload/files/lisuzarev.pdfIn PDF document text
    • http://geometrabottero.it/userfiles/files/15071814165.pdfIn PDF document text
    • http://kmbb.at/userfiles/file/lukobojexuginurotadogolap.pdfIn PDF document text
    • https://impulsa.mantareys.net/uploads/plantillas/files/75893063463.pdfIn PDF document text
    • http://vet-arrighicolangelicristilli.eu/userfiles/files/tavowofad.pdfIn PDF document text
    • http://studiolorenzoni.eu/userfiles/files/14017977818.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16133e5bd9fbe8---newuxefageronufad.pdfIn PDF document text
    • http://archiprojektai.lt/app/webroot/uploads/userfiles/files/ganijutepusowotifunuzo.pdfIn PDF document text
    • http://firmen-bekleidung.at/userfiles/file/60722181332.pdfIn PDF document text
    • http://keifo.ru/ckfinder/userfiles/files/75078947082.pdfIn PDF document text
    • http://tecresconsolidamentorestauro.it/fck_data/file/43969535014.pdfIn PDF document text
    • http://iwilldoit.ru/uploads/files/files/guvepanivazabovavut.pdfIn PDF document text
    • http://divorcefinance.nl/uploads/file/4414698660.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=adobe+acrobat+reader+android+downloadPDF link annotation
    • 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_off0000c2e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2E9 18792 bytes
SHA-256: 1f93156fbd615030299d0bd30a41f8b5be560d2483c6c7197ebd65c4fca8a49f
font_01_sfnt_off0000f33f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B56 10400 bytes
SHA-256: d95f88c03f1860ca1beddcbc655a947adf6ef0f15372f5a24496086eac1819cd

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