Malicious PDF — malware analysis report

Static analysis result for SHA-256 45fc04db9748cb85…

MALICIOUS

PDF

87.4 KB Created: 2021-09-08 08:12:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 13a60262494d0cbee3ec86f7ded8f1df SHA-1: dc5ad23ce3fd0a3fb42c2bcad02335190013f9fe SHA-256: 45fc04db9748cb8595984bef6ca2f0c59870987934e992ae19e61cfc004841df
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a non-clustered link farm on disposable hosting, further supporting the malicious intent of directing users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3092

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
  • 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
  • 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://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/5ec1116dedc99813ae248b26245268a7/34797459100.pdf In PDF document text
    • http://fultonhighschoolclassof1977.com/clients/a/ad/adf64365ba34d951c098eb677b062caf/File/84140888203.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/fagipudej.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/7fd5479a6cf389400531226c6cb5ed85/99764333811.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16116ef3d0f52f---jovumijoxamogirave.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/13212331281.pdfIn PDF document text
    • https://reha.bg/content/upload/file/41964158490.pdfIn PDF document text
    • https://livres-arts.com/ckfinder/userfiles/files/33344714831.pdfIn PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/viralifakotejipalupuwinel.pdfIn PDF document text
    • http://digilit.ir/basefile/digilitir/files/19671680016.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/j73ga8ecmnhnfbbno09i8tmfpr/bolowujisadurapo.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160e9439784e77---savakar.pdfIn PDF document text
    • http://28777886.com/Lpf/UPFILE/userfiles/files/8876432792.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cec5455ac9---65347536365.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160714682b3cbf---vujixemepozetikusipen.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/1bbac4a40cb1800eb6bb76df1aa6bd26/tanozanemimewanuwinit.pdfIn PDF document text
    • http://wf515345.tw/CKEdit/upload/files/69467964102.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/ltqqat4ccia2gvabtkcu4r1s1d/luwirudezovunaderisarot.pdfIn PDF document text
    • https://krygina40.ru/UserFiles/File/1622834582.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b6ead4d2c---21547483717.pdfIn PDF document text
    • https://avukat.dnsaktif.net/upload/files/79466306114.pdfIn PDF document text
    • https://net-mex.hu/ckfinder/userfiles/files/5101645715.pdfIn PDF document text
    • http://homenet-spb.ru/userfiles/file/70324242390.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/o86e0874sa3sbmd6csieuu23tm/legugexoxevuxezidexox.pdfIn PDF document text
    • http://phyllisrubensteinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/82180285157.pdfIn PDF document text
    • https://eseninternational.com/uploads/files/93519940386.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16115b365de740---josakemanakibokun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=sampling+procedures+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001198a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1198A 17136 bytes
SHA-256: 6b330169e6727595271715cd9f6190bfdb49857c95cecee2011a2061fd7bed1b
font_01_sfnt_off00014642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14642 11040 bytes
SHA-256: 04e8b8c268b925e61907c96715c192d33a4401cb2366a20e6d4de69bda399102