Malicious PDF — malware analysis report

Static analysis result for SHA-256 0220aeadbe962313…

MALICIOUS

PDF

68.8 KB Created: 2021-09-27 05:54:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b061a9960966330374cdb8b7c3c02ce5 SHA-1: 4caeb65555b1bc9e365bb8cb8a3269945f809a18 SHA-256: 0220aeadbe962313a01a97179d172b5bbfbc91f996e02faa8bf1bed610a48b73
176 Risk Score

Malware Insights

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

The file was detected by ClamAV as a Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. Multiple heuristics identified it as a link farm pointing to compromised websites and potentially disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs, including one using a raw IP address, are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/57f4e107fe45f437e55306c0ce0da698/39023115057.pdf In PDF document text
    • https://zlatartopalovic.rs/files/62297220397.pdfIn PDF document text
    • http://thietkewebbacninh.com/webroot/img/files/81530638239.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/dakesowodi.pdfIn PDF document text
    • http://innobiztour.com/FileData/ckfinder/files/20210909_C5A9D11B8DC414AB.pdfIn PDF document text
    • http://chayka-svg.ru/files/vepebib.pdfIn PDF document text
    • http://audyt.rowerowaszkola.pl/imgturysta/files/xiwewesawedajepajamoxige.pdfIn PDF document text
    • https://network-italia.com/file/95914094044.pdfIn PDF document text
    • http://1hozain.ru/files/userfiles/files/80727719433.pdfIn PDF document text
    • http://185.33.116.142/~bbyacht01/upload/files/91330812222.pdfPDF link annotation
    • http://www.swaving-stalinrichting.nl/ckfinder/userfiles/files/97435986580.pdfIn PDF document text
    • http://iwayman.com/uploadfiles/file/210902182558887409neacwv.pdfIn PDF document text
    • https://xn----7sbeo1acdy3adh.xn--p1ai/userfiles/file/83993873635.pdfIn PDF document text
    • http://riverside-plaza.com/upload/userfile/files/52605222857.pdfIn PDF document text
    • https://comtraining.cl/userfiles/files/gateratotalusave.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/bdb97785aa15017b1a21c8281e0ef196/deduzowe.pdfIn PDF document text
    • http://tacchigroup.com/public/thread/risorse/file/jiwuli.pdfIn PDF document text
    • https://sportcity.bg/webroot/img/content/files/vojaxuvukizobita.pdfIn PDF document text
    • http://bodybybodyology.com/ckfinder/userfiles/files/83068911183.pdfIn PDF document text
    • http://kondicionery-pushkino.ru/upload_picture/file/64168301944.pdfIn PDF document text
    • https://apteka-wratislavia.pl/halatecza/userfiles/file/3336772257.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614ee991116de---49466821375.pdfIn PDF document text
    • https://stcc-sa.com/motakamel/Ups/files/16711688794.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=logo+animation+apkPDF 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_off0000b198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB198 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c9aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9AA 14904 bytes
SHA-256: 8c9ab61d9c4c91481675bc2a1b5f97fb101e17acf6d72423453cd8c5deffbe68
font_02_sfnt_off0000eeee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEE 10200 bytes
SHA-256: 1c8ca421b363fb793f5cd402b7f8c6cea051ca3deaf4bf18ebf90725dfa542d9

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