Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ebdb0da02202731…

MALICIOUS

PDF

81.9 KB Created: 2021-09-12 23:31:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 59d2076a0b1af9df511c44b7d9db3011 SHA-1: acc33e4427c925d58ec4302d32576c1c868f0800 SHA-256: 0ebdb0da02202731c540e6ad24ca2c54d5bdc624f13579212f984439ec4b10cc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification strongly supports its malicious nature. The presence of embedded URLs and the nature of the heuristics suggest the primary goal is to redirect users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://irlanc.ru/uplcv?utm_term=file+for+ppsspp+dragon+ball PDF link annotation
    • http://vetcasatenovo.it/userfiles/files/nuxotinajazupubikef.pdfIn PDF document text
    • http://dpholding.ru/uploads/files/72167814609.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/161323969017a0---divekagivid.pdfIn PDF document text
    • https://jotekonybakterium.hu/userfiles/files/dabuxenidava.pdfIn PDF document text
    • http://pantipplaza.com/userfiles/file/dakarupavemupuronavewav.pdfIn PDF document text
    • http://hypotekaprezamestnancov.sk/res/file/41206740029.pdfIn PDF document text
    • https://hbphoto.ca/resimler/files/76827297241.pdfIn PDF document text
    • http://woodlandhills.ilovepokebar.com/uploads/files/10746925366.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16137e34772cd6---99722546318.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/doumt4suqa94hkgrl56k9v47ls/11187864990.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133763dca7d4---32556165082.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16137f6d77848f---xikisedubojijuxe.pdfIn PDF document text
    • https://sealskinz.ru/files/file/14067057123.pdfIn PDF document text
    • http://thermogroup.ru/uploads/files/roxanodogunujezipumu.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/17488822063.pdfIn PDF document text
    • https://diphong.com/uploads/vegalisewunonujebapamaz.pdfIn PDF document text
    • http://laboratoriodiprogettazione-ve.it/userfiles/files/59242421683.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9cc049a85---fisaxe.pdfIn PDF document text
    • http://chipublichouse.com/ckfinder/userfiles/files/sajovuj.pdfIn PDF document text
    • http://neodentpetrosino.it/userfiles/files/73318073879.pdfIn PDF document text
    • http://bycongroup.com/UserFiles/file/83131590045.pdfIn PDF document text
    • http://www.yemany.com/yemfiles/files/12341960682.pdfIn PDF document text
    • https://media-get.ru/userfiles/files/3097225116.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_off0000d966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD966 10692 bytes
SHA-256: 5d59fc4c6be3c3598fa4f2b962a92a0871e3e4adb85e0677416e9ba3d4668fdb
font_01_sfnt_off0000f17f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17F 18584 bytes
SHA-256: 2f0b4f61bd6e8af0ddd3b3c5191359d629b66e7df42a2faa394f03a3dbe552c4
font_02_sfnt_off000121c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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