Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fcd30c49bc28350…

MALICIOUS

PDF

72.9 KB Created: 2021-09-13 18:13:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 6302ed3e88c80f3d7afe7d0501265d6f SHA-1: 04e9c7977063a6a6ecee7883714f3b1eb4e6f9da SHA-256: 2fcd30c49bc28350feec3312ff191c8424a6d672b32c43aa8ce7ebfc26a2cc24
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and link farms, suggesting it's used to redirect users to malicious content. The PDF structure and embedded links are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://batistar.fr/userfiles/file/jidup.pdf In PDF document text
    • https://matfplayer.com/calisma2/files/uploads/tapamozubezutamilidasuxas.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612f46ad19ef9---woleruzupuguwapetigowa.pdfIn PDF document text
    • https://hiroyoung.com/data/files/57389340626.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/d472400dda49ee96ec3164146215276a/15870528654.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/161364ed49e217---74930194258.pdfIn PDF document text
    • http://helderlive.nl/ckfinder/userfiles/files/38960699705.pdfIn PDF document text
    • https://lbk-ingatlan.hu/uploads/file/bipepafugavilaf.pdfIn PDF document text
    • http://smsalumni1971.com/apadmin/uploads/userfiles/files/53180559343.pdfIn PDF document text
    • http://dralituncer.com/userfiles/file/20241397959.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/lofesow.pdfIn PDF document text
    • http://peneleos.pl/userfiles/file/zogitenewerozubizigoniviw.pdfIn PDF document text
    • http://nj-rshb.com/v15/Upload/file/202193182202454.pdfIn PDF document text
    • http://garankuccu.com/upload/fckimagesfile/ed7ef4d341ae839d24bea44f7d4d57b0.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed73ff0a77---kuvemotoborupapid.pdfIn PDF document text
    • http://starma.pl/files/file/37309034623.pdfIn PDF document text
    • https://riondene.ch/img/uploads/file/birijatu.pdfIn PDF document text
    • https://kozlovka.mebel18.com/uploads/files/1566847392.pdfIn PDF document text
    • http://generoussecurity.com/uploads/63547871598.pdfIn PDF document text
    • http://cdkuys.handysociality.com/upload/files/16210800111.pdfIn PDF document text
    • https://flour.co.uk/ckfinder/userfiles/files/96390868127.pdfIn PDF document text
    • http://finpacecuador.com/userfiles/file/83727848771.pdfIn PDF document text
    • https://thanaclusterwestgate.leaddeehub.com/userfiles/files/53837381482.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/ae51f92c0e8bd52e461d5cd5db125ff1/64637898318.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/fa9tuvt1nn0d7cjia8gf7upmjp/mumetit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=oxy+iptv+apk+iosPDF 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_off0000baf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAF2 10260 bytes
SHA-256: 66d1913ad9be3db892a6831344b3753e7c0933d485a0fb353855fa9b096ee232
font_01_sfnt_off0000d244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD244 17072 bytes
SHA-256: f6bf1fe91b589ae76a927e23e26f43dd278b9c446b4664b2bde72afab7bb25c7
font_02_sfnt_off0000fe85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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