Malicious PDF — malware analysis report

Static analysis result for SHA-256 32bf597099f6af83…

MALICIOUS

PDF

80.0 KB Created: 2021-09-14 14:18:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d281a312bca5fb671d2beb1c42c4e77e SHA-1: 14b2fe03859eba3595b6593056cf41dfa4d63979 SHA-256: 32bf597099f6af83dffa3f77bf2b0e814d197ef65060b5d5bcb62eb0ee66119a
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample is identified as malicious by ML classifiers and ClamAV, with a high-severity heuristic indicating a payment redirection lure. The PDF contains numerous links to external PDFs hosted on various domains, many of which appear to be disposable or low-reputation, suggesting a link farm designed to obscure the ultimate destination. While no scripts were explicitly extracted, the PDF structure and the presence of external links are consistent with a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://floral-design-lindgens.de/userfiles/file/4170571741.pdf In PDF document text
    • https://aviatroglo.fr/IMG/file/44849114704.pdfIn PDF document text
    • http://kovovyroba-nosniky.cz/UserFiles/File/17153554421.pdfIn PDF document text
    • https://ietc-oman.com/userfiles/files/fuwopomeketogesasov.pdfIn PDF document text
    • https://vsetinrally.cz/userfiles/file/56648469108.pdfIn PDF document text
    • https://eminenceconstruction.ca/viking1/uploads/files/66133953747.pdfIn PDF document text
    • https://mp2020.csysadmin.com/ckfinder/userfiles/files/40277145253.pdfIn PDF document text
    • http://mindentudor.hu/userfiles/file/gasekuwazekon.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/27432795715.pdfIn PDF document text
    • http://nwatchonline.net/userfiles/file/13860328270.pdfIn PDF document text
    • https://lodoshosting.com/calisma2/files/uploads/wexapubevaxaruwike.pdfIn PDF document text
    • http://ministerium.pt/files/87411385406.pdfIn PDF document text
    • https://groupunsur4.com/contents/files/52060907621.pdfIn PDF document text
    • http://fibertechnique.com/tmp/file/gunofibigafekozoj.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139e8d800b0e---22517694416.pdfIn PDF document text
    • https://highlander-inn.com/assets/userfiles/files/majixedenorulijopemat.pdfIn PDF document text
    • https://regiefranchet.fr/userfiles/files/26266259628.pdfIn PDF document text
    • http://webinaris.net/ckfinder/userfiles/publics/files/1584984974.pdfIn PDF document text
    • http://tydafa.com/dafa/uploadfiles/20210906072500.pdfIn PDF document text
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/7288316514.pdfIn PDF document text
    • http://sportingfoundation.com/uploads/file/69905204751.pdfIn PDF document text
    • http://laskod.hu/userfiles/file/motumufazuvidukokuwuzata.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/file/mepare.pdfIn PDF document text
    • http://musicincw.com/fckeditor/userfiles/image/fexakimodolodit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=garmin+asus+a10+android+updatePDF 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_off0000d387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD387 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9E 10820 bytes
SHA-256: 785b4e309e9716ceb0492f66ed994551d3bf82550e420ffd84f57dcd0cf5710f
font_02_sfnt_off00010490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10490 17612 bytes
SHA-256: 4d5f688f205a9b359ae488406f27c2191b0a524ba7afaf1cf9acb5ae2f497248