Malicious PDF — malware analysis report

Static analysis result for SHA-256 d44ecac92d701e58…

MALICIOUS

PDF

81.8 KB Created: 2021-09-22 10:05:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e7f9f15b935ac87a466ef67c52d37395 SHA-1: 8bcc46dfdb863b5cdaa1aa17234ed4ebb3c6cab9 SHA-256: d44ecac92d701e58c2410f64ddbc28bd1555b6b6e8b86c7ae2bcc86fc56abab8
156 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains numerous links pointing to compromised websites, suggesting a link farm or phishing lure. The presence of 'how to hack someones hotspot' in a URL, combined with compromised WordPress uploads, points towards social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/bt62so4s8h7h925kga384g16h1/28056317016.pdf In PDF document text
    • http://incomsistema.ru/ckfinder/userfiles/files/95299521257.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16145be3dc0eef---xomum.pdfIn PDF document text
    • http://narzedziascierne.eu/Upload/file/13937250797.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/69428094578.pdfIn PDF document text
    • https://isleo.com/i_photos/file/vufabasexarelodotide.pdfIn PDF document text
    • http://1day2night.com/UserFiles/file/95094575879.pdfIn PDF document text
    • http://fueandhair.com/userfiles/files/54631407481.pdfIn PDF document text
    • http://parilka.by/var/upload/file/norekogulaxovokunojar.pdfIn PDF document text
    • http://epoxidice.ro/mm/file/gedubegezesad.pdfIn PDF document text
    • http://usagimatur.com/files/others/55318124360.pdfIn PDF document text
    • https://www.mmgrowersg.com/ckfinder/userfiles/files/novaluvugusixanotixixefo.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/dopawuwaxanevugogot.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613e94308ac09---botinutuvifufojimetosotig.pdfIn PDF document text
    • http://recviem.ru/img/upload/56941444777.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1613b620b838dc---2542743338.pdfIn PDF document text
    • http://predit.ru/admin/ckfinder/userfiles/files/vurabotadatogasukitepi.pdfIn PDF document text
    • https://wanfutemple.urwaydesign.com/data/file/userfiles/files/44660225082.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/jg8upndkrefv8io82v09umk917/32128604743.pdfIn PDF document text
    • http://abc-tel.ru/data/File/fowagadunoduxabi.pdfIn PDF document text
    • http://falegnameriacastiglione.it/userfiles/files/tipabutukakelujuronomuj.pdfIn PDF document text
    • https://noursportevents.com/wheelmarine/userfiles/file/midow.pdfIn PDF document text
    • http://miraesusan.com/ckupload/files/51781367261.pdfIn PDF document text
    • http://ryanoomen.nl/uploadimages/files/zevuduvigosisusotopul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+hack+someones+hotspotPDF 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_off0000dc08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC08 17480 bytes
SHA-256: 610ffd0bded5c6ad1fa68eb6ce62a192c535b1229855d2888e46714aa3549959
font_01_sfnt_off0001098c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1098C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A3 10568 bytes
SHA-256: 6c82f25302229cd3b39a87e1f70b67bde22af103ea0db88d82c9c3d39b16b3e6