Malicious PDF — malware analysis report

Static analysis result for SHA-256 04d0af4f772b1e3c…

MALICIOUS

PDF

79.3 KB Created: 2021-07-01 11:53:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: de9c00656bb1c91ef49dbde69fbdf8f9 SHA-1: 046e6d189ce26698f099945951a09cb2292090fc SHA-256: 04d0af4f772b1e3cc1dd8442a68054109593699a11b39e2ab7aded5d5dc93db0
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content. ClamAV detected this file as Pdf.Phishing.Trojan, further supporting its malicious nature. No scripts were extracted, but the presence of embedded URLs and the link farm structure suggests an attempt to redirect users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2676

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 http://glotecgh.com/upload/editor/file/24889883439.pdf In PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/a3d636abb48fe08f39f940c53bcf9b2a/watawedaguwujetebopigam.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608712171d41a---suzoxirewojupedo.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d5c2ed1cb---54500220056.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ce273d8bd---95360590159.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/5f16beb40e3380b322631204f59a4345/tekopoxesufu.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/pamupigodade.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/64237510167.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/82497785710.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1607077776db32---1040643357.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d2da664c0b6---47681356533.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ad0e5890f---polidekimaveburenazug.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085a6e085b2e---82067040042.pdfIn PDF document text
    • http://anvlaw.com/userfiles/file/vumovemevivelonigojo.pdfIn PDF document text
    • https://aymfly.com/aym_image/files/dateworebavajas.pdfIn PDF document text
    • http://vds-construct.pl/userfiles/file/gavenaxuzunojupidoxikimen.pdfIn PDF document text
    • https://quaint-house.com/42734166871.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606d60b2c9eee---14057701528.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/dobupewo.pdfIn PDF document text
    • http://bioscipublisher.com/files/upfiles/file/wewas.pdfIn PDF document text
    • http://www.abcklima.hu//data/editorfile/63933164015.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/ar3r4acfqdv1spe6uvo3o1lcg0/15414138101.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608fbc2b82766---vipogalikoxiperatogegeno.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160903252f3ac9---65802751987.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/7cc137f430a040abc2feb77b126dc255/64587953436.pdfIn PDF document text
    • http://china-hold.com/UploadFile/file/20210529205239009.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=plot+diagram+template+for+middle+schoolPDF 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_off0000eb9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9A 16872 bytes
SHA-256: 80852db1160915b72e919454874633fc98432afffd1ee12c91503ca42b75d55d
font_01_sfnt_off00011717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11717 10964 bytes
SHA-256: 0481b0b9ece53df8f85de02fb88b3091b9cf2067496ebb26a11960fd2d519fe0