Malicious PDF — malware analysis report

Static analysis result for SHA-256 28ed896d47ea89ed…

MALICIOUS

PDF

84.1 KB Created: 2021-07-01 10:58:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 0f8e2280e4bdce218dc6fabbe40c34c4 SHA-1: f2b7da1f6402313fc2ead9e117411d66c2bb7de5 SHA-256: 28ed896d47ea89edd03384aa9cf9e6bd9fa7807d93b6122c347f5bb08b260d57
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs are likely used to redirect victims to malicious content.

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 https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/50e23bc1735d0576eb1af90b23a9f4de/8040794698.pdf In PDF document text
    • http://aldo-ins.com/userfiles/file/dupexefometekexi.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/a3d116b77ed8e38a06c51cbd44c9f1fe/65883044062.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/58f62ac03d7a2bb663b6f1751fc72f44/tofodonadenizevove.pdfIn PDF document text
    • https://skatrip.com/basefile/skatripcom/files/masosamamikezixo.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2fe79173cd322a4c92662ad83a32b3a0/82887874018.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/85482190457.pdfIn PDF document text
    • http://zonweringnederland.com/ckfinder/userfiles/files/tunokutelojatalijas.pdfIn PDF document text
    • http://haphadoor.com/upload/files/vafamodutixunefimulowezes.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/5d5c7360db2c5570d8b1dfb641c99587/vopiwirenetusi.pdfIn PDF document text
    • http://wang023spa.com/userfiles/202106file/2021061410511970554.pdfIn PDF document text
    • http://porpora.biz/imagenes/imagenes_contenidos///73006716408.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb8ef78dd9---rewinabuzuxagukem.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/20dc2f1e14e493663b6f78cb3976e18f/totow.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1607c43b50a02c---81802336506.pdfIn PDF document text
    • https://betentour.com/sites/default/files/file/75299118826.pdfIn PDF document text
    • http://e-cluny.cz/UserFiles/file/nudixi.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2621adf9cd---93678592615.pdfIn PDF document text
    • https://tavio.ru/files/file/wusejo.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/32805707373.pdfIn PDF document text
    • http://fabtur.ru/upload/files/mijupujaxejuvipesubina.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160758fde98b1e---53962234052.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abdccdf12a0---28234641266.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/xalofaxewapalebuvuta.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=normalize+data+meaningPDF 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_off0000e6fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FD 16668 bytes
SHA-256: e69a7ddd29a658707a273acdba349cd38426d363713813f8981aa1a2ef46c805
font_01_sfnt_off00011258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11258 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A6F 10460 bytes
SHA-256: 4d93d03c608a45e90751728fea6a167840454d69d2a94c0044253f8b7bc65689

Open this report in the interactive analyzer, or submit your own file for analysis.