Malicious PDF — malware analysis report

Static analysis result for SHA-256 bce0c38d828cd5a3…

MALICIOUS

PDF

81.1 KB Created: 2021-10-06 22:06:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 9369672f58066bbf06ea54cacd748ad1 SHA-1: f13f3c37ad62b747b2adcbc39983cdc0ea807735 SHA-256: bce0c38d828cd5a37aa257f68c74f6a66a1fefec606c57ffdc6687408ca34324
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, with many URLs pointing to compromised WordPress sites and disposable hosting. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. The document's purpose appears to be directing users to potentially malicious external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://mientrungland.net/uploads/image/files/gorovadilujeledudalen.pdf In PDF document text
    • https://chp-travel.ir/data/file/tefefi.pdfIn PDF document text
    • http://www.novosib-sport.ru/ckfinder/userfiles/files/51308245558.pdfIn PDF document text
    • https://alummaswaja.com/yii/sdbalikpapan/home/images/upload/files/24045600741.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/161407a0b375f8---dujizazakowofupabekadevi.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/tiguv.pdfIn PDF document text
    • https://www.potravinyav21.cz/ckfinder/userfiles/files/76325401251.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/41081033015.pdfIn PDF document text
    • http://mpwlawpa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fugawuvisupe.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210912213246138.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/36572390010.pdfIn PDF document text
    • http://andrenickels.de/ckfinder/userfiles/files/ditovo.pdfIn PDF document text
    • https://crcnueva.naturasoftware.com/uploads/images/files/begenalusifixiliraba.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/niwija.pdfIn PDF document text
    • https://dangeloremodeling.com/nbloom/fckuploads/file/24627795002.pdfIn PDF document text
    • http://kk-gorenjska.si/uporabnik/file/96717929220.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/xegemunaxawiridetizukajef.pdfIn PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/kikosuwuloxidid.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/66791633203.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1615d92100a831---rerolagetuzenanu.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/124d8da04bd1ec8df4d1515b8bfa739c/29280163709.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/49688924547.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc310b6135---10268472983.pdfIn PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202109261132116611.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/d906e18306b47849ec28d1d5afb58f62/38961474393.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=how+many+legs+per+segment+do+millipedes+havePDF 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_off0000d591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD591 18688 bytes
SHA-256: 705734c889f030ab3e34bd4fc3cd3bdb3d036b3b0156ca09a56ced79d880d839
font_01_sfnt_off000104fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FB 11096 bytes
SHA-256: 07899246bd93711d754e8f88056cf230a97a650f979c22727e28e79efa3d4e69
font_02_sfnt_off00011e75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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