Malicious PDF — malware analysis report

Static analysis result for SHA-256 9feb41db3d98f9a0…

MALICIOUS

PDF

82.7 KB Created: 2021-09-18 09:51:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: baeca1c6cc8c9f7317021382491e0c98 SHA-1: 6a31c00877dce000193f3e055efeb6851e59fa99 SHA-256: 9feb41db3d98f9a08cca4cbe987bee7c1c2c702b62f20973f0fe5e8e6828ae1e
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many of which point to suspicious domains and are likely part of a link farm designed to redirect users. The heuristic 'SE_QR_LURE' suggests the document may instruct users to scan a QR code, a common tactic in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • 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.
  • 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 https://12tiga.com/contents/files/dosadupakoponadite.pdf In PDF document text
    • https://rougezenekar.hu/files/file/sojekesaxetox.pdfIn PDF document text
    • http://vanguardhungary.hu/userfiles/file/rujorapedasopeminevonu.pdfIn PDF document text
    • http://ricoconsultingattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/betetexis.pdfIn PDF document text
    • http://rucodelniza.ru/userfiles/file/44898336451.pdfIn PDF document text
    • http://pretaporter-pegah.com/userfiles/file/tilikorupazapuwox.pdfIn PDF document text
    • http://myappartement.de/web/editor/files/45367002939.pdfIn PDF document text
    • http://ultrabeauty-ff.ru/userfiles/file/gemoraso.pdfIn PDF document text
    • http://hong-tour.com/FileData/ckfinder/files/20210908_79810ECA42BA2713.pdfIn PDF document text
    • http://104408017.linker.tw/files/removukometuke.pdfIn PDF document text
    • https://dom4m.lv/userfiles/files/nojarajebinotaxekube.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/jifasa.pdfIn PDF document text
    • http://anindecor.pl/files/file/3484925900.pdfIn PDF document text
    • http://kepco-group.com/uploaded_files/userfiles/files/38225676918.pdfIn PDF document text
    • http://dealershop.es/userfiles/file/vosomuvire.pdfIn PDF document text
    • http://pelesiuvalymas.lt/i/File/10827921355.pdfIn PDF document text
    • http://jamxmpharmatech.com/upload/files/77409650936.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/91911881729.pdfIn PDF document text
    • https://yumasri.com/assets/ckfinder/userfiles/files/45911103904.pdfIn PDF document text
    • http://dirpub.org/editor/ckfinder/userfiles/files/volufiwiwovosopu.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/83cd722bba7fff501efc3869e5ddc914/98259191915.pdfIn PDF document text
    • http://goldia.cz/data/file/tojubesavelo.pdfIn PDF document text
    • http://vietsinphar.com/uploads/files/kuvijolekuxupul.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/bavokl3bjgjql27dhlse9jgrbc/66938799257.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=big+bang+genesis+qr+codePDF 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_off0000de9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9E 10740 bytes
SHA-256: 1ff3510a09b20a157db5bc78c4429d6d5926f7ee4dd3916749269a1199fa5f6f
font_01_sfnt_off0000f6f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F02 17744 bytes
SHA-256: a75561ab2b8b4c0d83adced571ac24f3b9381b72a5fd1ffdb63856628233f1ec

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