Malicious PDF — malware analysis report

Static analysis result for SHA-256 17c60fa6840e4773…

MALICIOUS

PDF

82.8 KB Created: 2021-09-14 19:32:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1cb678e97277b83402610f43695162c7 SHA-1: b5e4a0d37eb86c8ae396424570bc059014d8e225 SHA-256: 17c60fa6840e47731947e9cf86e539e327b21534404b3d2b615c17155c821f90
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to domains that appear to be part of a link farm, a common tactic for phishing or distributing further malware. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://nomylo.ru/uplcv?utm_term=c%2B%2B+book+download PDF link annotation
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/kamibutotalovuwupoxol.pdfIn PDF document text
    • https://gabconstruction.com/ckfinder/userfiles/files/26996101018.pdfIn PDF document text
    • http://galantemontagnana.it/ckfinder/userfiles/files/46065921724.pdfIn PDF document text
    • http://dintainoodle.com/uploads/files/44403019691.pdfIn PDF document text
    • http://feriaalainversa.com/uploaded/files/zojigeluxurenewapepetino.pdfIn PDF document text
    • http://ls12368.com/userfiles/file/zoberisenomak.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/86949534e26f46f13af311597d28db12/82973963193.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/34653792875.pdfIn PDF document text
    • https://fo-prefectures.com/pages/files/jizagesalivafuladasazuxe.pdfIn PDF document text
    • https://cuatudongsaigon.net/uploads/files/35413471522.pdfIn PDF document text
    • http://shesob.com/file/files/64322110845.pdfIn PDF document text
    • http://24horasnoar.com.br/ckfinder/userfiles/files/bunalafefutapid.pdfIn PDF document text
    • http://owop.challengersports.com/ckfinder/userfiles/files/segejitifune.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/wasokadisutit.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/tufupijanowudido.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/xakudunofoxov.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/19afbbfac3685e88298d9dfcda469c8f/12340956531.pdfIn PDF document text
    • http://kelkenaghshband.com/app/webroot/img/files/naxeroxufepidotidefu.pdfIn PDF document text
    • https://hchoanglong.vn/userfiles/file/17265475331.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/petaroronavirixowenavim.pdfIn PDF document text
    • http://www.cottagegrad.ru/files/file/73917657595.pdfIn PDF document text
    • https://noriupapildu.lt/ckfinder/userfiles/files/kilinarilabakokugagez.pdfIn PDF document text
    • http://kdekdyjak.cz/data/82529861181.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_off0000e065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE065 10000 bytes
SHA-256: 0c93745851890f6b55821a560cab12757c51ca9ac1dbdbaba2a91b5b0e24d61a
font_01_sfnt_off0000f6b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ECB 18328 bytes
SHA-256: b626ec64fd816deb6c724efba3396e1851c908b2177e0093fb3a95c91467c95c

Open this report in the interactive analyzer, or submit your own file for analysis.