Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee12dbe50e55f8ea…

MALICIOUS

PDF

70.4 KB Created: 2021-09-24 22:03:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 35f1b0de8e889bb52e297289b8bf648f SHA-1: 0359a91ba26af4b34545a9cf56b89005341a09b0 SHA-256: ee12dbe50e55f8eac937ed672cc5e33cb6a9e3539bdcd425b0bff45035f0ca0b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or redirection scheme. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically flags the document as a link farm on disposable hosting, reinforcing the phishing/malware lure hypothesis.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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
  • 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 https://pixomot.ru/uplcv?utm_term=upload+photos+to+computer+from+android PDF link annotation
    • http://hc6999.com/userfiles/files/gakozubawalenopamed.pdfIn PDF document text
    • https://careersourcechipola.com/files/public/41522924491.pdfIn PDF document text
    • http://sdes.in/uploads/59475023428.pdfIn PDF document text
    • https://nmcs.ca/userfiles/files/92257681409.pdfIn PDF document text
    • http://inimtrento.it/userfiles/files/selob.pdfIn PDF document text
    • https://ehotelgateway.com/bot/ckfinder/uf/files/potufutuvux.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/xuvamifibesifulikubugir.pdfIn PDF document text
    • http://bushurov.ru/images/files/93532706421.pdfIn PDF document text
    • http://directopinion.biz/uploads/FCK_files/file/vavewejotuvaxafaxido.pdfIn PDF document text
    • https://amadesafar.ir/basefile/amadesafarir/files/nusumopadamasixunife.pdfIn PDF document text
    • http://nhungbaithuocnam.com/img-tvdl/files/90427432519.pdfIn PDF document text
    • https://oncetrabzon.com/resimler/files/82203212482.pdfIn PDF document text
    • http://cukierniabrzezinski.pl/www/artizam/fck/file/tunezugurut.pdfIn PDF document text
    • http://cartopack.be/Images/file/59562280370.pdfIn PDF document text
    • http://dermatologomiguelgallego.com/miguel/fck/file/61733894956.pdfIn PDF document text
    • http://sbstroy53.ru/img/files/fufurup.pdfIn PDF document text
    • http://happyorderfood.com/uploads/files/16264101243.pdfIn PDF document text
    • http://ageofwonders.buka.ru/sadm_files/samuvi.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/7f8ee4d367364eaf747627961fab3ee1/vubopikux.pdfIn PDF document text
    • http://ideal-site.ru/userfiles/file/rozibejosukadumatoba.pdfIn PDF document text
    • https://pinyardim.com/calisma2/files/uploads/57331718619.pdfIn PDF document text
    • http://skrutit-probeg.ru/upload_picture/file/28210171699.pdfIn PDF document text
    • https://www.xyoaa.org/sites/default/files/files/famusivupukid.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/lodidatifenowijupabux.pdfIn PDF document text
    • https://dcmheavyequipment.com/admin/images/file/nuwinupoposibezege.pdfIn PDF document text
    • http://bobas24.pl/Upload/file/53011771840.pdfIn PDF document text
    • 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_off0000b150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB150 16084 bytes
SHA-256: fba862990ebcd63056fd65b4a17fa519cc5fc2111a3f85957b50635bd544ef4c
font_01_sfnt_off0000da42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA42 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF259 10992 bytes
SHA-256: 76840a38280f930f5769c5a3b72e410bdb8f81d372e2bd0241c01258aee698d0

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