Malicious PDF — malware analysis report

Static analysis result for SHA-256 75d0ed56ca044bb4…

MALICIOUS

PDF

78.0 KB Created: 2021-09-09 05:58:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6c1442df987d00669f850a9afb7e8263 SHA-1: 8a5ef86a679dc51901c53082840eb2fc456426f6 SHA-256: 75d0ed56ca044bb47c93ea81d16a3a731068466a561f1a3ac143da7fa4730d2c
126 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It contains numerous external URLs, many of which are part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. The presence of 'utm_term' parameters in some URLs indicates tracking, common in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://pistant.ru/uplcv?utm_term=adobe+photoshop+premiere+pro+apk PDF link annotation
    • https://elpollopaulino.com/cenavarra_userfiles/files/gerubibevusagune.pdfIn PDF document text
    • http://sweatrinserepeat.com/ckfinder/userfiles/files/56244175859.pdfIn PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/48475619424.pdfIn PDF document text
    • https://value.ae/userfiles/file/gizodivaxibonetaxelaxu.pdfIn PDF document text
    • http://cobmedia.hu/include/88346505471.pdfIn PDF document text
    • https://jaukiaplinka.lt/ckfinder/userfiles/files/wonopoxixemikelazazera.pdfIn PDF document text
    • https://lotteppta.net/beta/assets/file/75496284176.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/lujugo.pdfIn PDF document text
    • https://fruitssupplier.com/app/webroot/img/files/88778957585.pdfIn PDF document text
    • https://wedding-photos.cz/userfiles/file/10502200967.pdfIn PDF document text
    • http://adwokaci-pila.pl/userfiles/file/dovofudeweru.pdfIn PDF document text
    • http://yongqingtech.com/d/files/mibolupiduwadiz.pdfIn PDF document text
    • http://xn--80aafbjcazdrhzgiddbbcsg4l.xn--p1ai/pict/file/2759583393.pdfIn PDF document text
    • http://ithalattagarantibelgesi.com/resimlerfiles/felulinolejev.pdfIn PDF document text
    • http://austria-ex.com/images/blog/file/41085073296.pdfIn PDF document text
    • https://liur-krd.ru/userfiles/file/dinujagekejanivonotes.pdfIn PDF document text
    • https://supportsystemsvainc.com/home/ssvi/public_html/ckfinder/userfiles/files/lesisufarek.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161317eecf347b---10507124046.pdfIn PDF document text
    • https://2ruoteexpo.it/ckfinder/userfiles/files/xiput.pdfIn PDF document text
    • http://distant-property.ru/fck_editor_files/files/59575633791.pdfIn PDF document text
    • http://anquocrealty.com/uploads/image/files/modena.pdfIn PDF document text
    • https://upaspor.com/resimler/files/vipusiwir.pdfIn PDF document text
    • http://studioambienteterritorio.it/userfiles/files/45746045079.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/g08r2ftjukfphgvu2lhfs59rs1/83022059898.pdfIn PDF document text
    • http://fields-on-earth.com/images/blog/file/38577686137.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000b7cf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB7CF 18232 bytes
SHA-256: 182694dcc4955b3e0578dacf3112128def0a670cb8cb7bab9067e27debb83aee
font_01_sfnt_off0000d4c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ecd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD5 14504 bytes
SHA-256: 2d0383c7fc79265ee7d5c8a3a54c84d67d571f584185d430ac5228f26229fb0f
font_03_sfnt_off0001113b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1113B 10720 bytes
SHA-256: 1e442b576ff7189a8d98827c6a38de4d30edf89a086ab4cd3f2ab88ebc33d643