Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd1f7a142b88b16c…

MALICIOUS

PDF

94.7 KB Created: 2021-08-21 10:59:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 031c356fd0b899c97e2d0935fb1c0fed SHA-1: acb4ae57e3d625fbf821f3918ed9a4894ad66ac6 SHA-256: dd1f7a142b88b16c8e0cc8389e19ba102994f57766a78f7030ce4c244fd1ebb1
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised websites or disposable hosting, suggesting it's used to distribute further malicious content or phish users. The presence of external URIs and link farm indicators strongly supports its role as a delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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 http://nanoscopy.ru/uploads/files/58918631297.pdf In PDF document text
    • http://citranco.com/users/files/pegokekude.pdfIn PDF document text
    • https://pass-eco-energies.com/ckfinder/userfiles/files/jipirikusikopetababex.pdfIn PDF document text
    • http://childhood-matters.com/clients/49507/File/kixajapelixalo.pdfIn PDF document text
    • http://palenice.net/obrazky_clanky/file/giwopewopuma.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/c5df576c2221b9c6223fed8ec8ef0b70/wamoxafexugivivapekinis.pdfIn PDF document text
    • http://capitalclassof1971.com/clients/4/4c/4c1e4f015ba9b8bec237dc1ca705466d/File/meluxifufafenojaferaxoju.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4fffa1906---lojogufamutovakuviwugi.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081b6beef1cf---tasuligikotu.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab397316446---74728541094.pdfIn PDF document text
    • http://kayapaliinsaat.net/file/93546690768.pdfIn PDF document text
    • http://appletechsolutions.com/userfiles/file/4290672497.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607775cd0fdcc---41615148722.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/mijawenizaxileguwawibe.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be0b8e3fa0d---25741778989.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/217659328.pdfIn PDF document text
    • https://banderlogclub.ru/Files/file/33871676183.pdfIn PDF document text
    • https://myclubowners.com/userfiles/files/javepumeledawozip.pdfIn PDF document text
    • http://samtekelektrik.com/files/rolejotiwewakikizixewasus.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608165024fbf8---10385703369.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608265d79efc2---65645005293.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/51b66018152d5ae4eb4245dabf37c637/zaxipupuwivaretesok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=naruto+shippuden+ultimate+ninja+storm+3+gameplayPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DD 16916 bytes
SHA-256: fad25e49f0793475bbfead976cc3ab9a52f5861ed442240e662de7150fdaf3c4
font_01_sfnt_off0001228f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1228F 6504 bytes
SHA-256: af4f7e0f936e4d7b7cc35c65985dc9b35585cc20eeb90045d7416df732ef2608
font_02_sfnt_off000139aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139AA 11332 bytes
SHA-256: d9e818a116dc11006e71706828018c832254dc9b286703326ed042e6628a3bac
font_03_sfnt_off000153f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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