Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa86ff43b8cd8e1b…

MALICIOUS

PDF

71.1 KB Created: 2021-09-26 11:50:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 7f20474f92f44b8b3f647ca2c88b1ef2 SHA-1: 219ae65dc5e28d387a27de2a76fdc1747f6209a7 SHA-256: fa86ff43b8cd8e1b89d9fcae49394984ff15025029ca00278d68cb91b3076c70
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The presence of a QR code lure further supports a phishing intent. No scripts were extracted, but the overall structure and URL distribution indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

Heuristics 6

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://sigmabhp.pl/userfiles/file/dafugapanimij.pdf In PDF document text
    • http://www.biosafety.biz/ckfinder/userfiles/files/11185481743.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146347f3dc14---61780175317.pdfIn PDF document text
    • http://sithome.com/upfiles/file/20210925063541.pdfIn PDF document text
    • https://hatinhjobs.com/upload/files/bobelumav.pdfIn PDF document text
    • https://momsgardenfoods.com/ckfinder/userfiles/files/52464377145.pdfIn PDF document text
    • http://clinicaveterinariasangiacomo.it/userfiles/files/sipatidumi.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/62856351792.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/kikebirafisiterizi.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/25573229655.pdfIn PDF document text
    • https://detskeihriska.eu/ckfinder/userfiles/files/51942846237.pdfIn PDF document text
    • https://gulfsupremesa.com/ckfinder/userfiles/files/guwusunevedezotanaj.pdfIn PDF document text
    • https://workinhotel.com/upload/fckfile/64785317443.pdfIn PDF document text
    • https://minjar.mebel18.com/uploads/files/79134875161.pdfIn PDF document text
    • http://conditum.nl/userfiles/file/kifezetomax.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/86e59ec325273596f80cc7904edcbbe1/89966050847.pdfIn PDF document text
    • http://unibox.lv/files/text/39520938362.pdfIn PDF document text
    • https://vanrun-it.nl/userfiles/files/domolofuwexuvobisofigako.pdfIn PDF document text
    • http://wpscrm.in/uploaded_files/userfiles/files/95985440471.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/12961741576.pdfIn PDF document text
    • https://tjpapigroup3.com/contents/files/62099636200.pdfIn PDF document text
    • http://zsdbiopharm.com/upload/files/xuwerubolos.pdfIn PDF document text
    • https://fullgame.hu/uploads/files/64291557491.pdfIn PDF document text
    • http://zatoodesign.com/userfiles/files/vukevuwemajoxa.pdfIn PDF document text
    • https://pristineleather.com/userfiles/file/mozitaxa.pdfIn PDF document text
    • https://ziyang100.com/userfiles/file/art_16319961009380.pdfIn PDF document text
    • https://angkalaris.com/contents/files/mobumoti.pdfIn PDF document text
    • https://soechi.net/userfiles/file/39671680461.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=modded+apk+storePDF 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_off0000b60e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB60E 16116 bytes
SHA-256: 221d52452755ce90166905f0e7fe81225c56493390ba7d6820fbbcebbd9d94be
font_01_sfnt_off0000df2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2D 10228 bytes
SHA-256: 1da00fc1a8562bea3ef7d6489f8e628791bb8b7f47f1c5ef80ec34cb7d940c51
font_02_sfnt_off0000f651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF651 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1