Malicious PDF — malware analysis report

Static analysis result for SHA-256 06ea830d7d5e5287…

MALICIOUS

PDF

97.3 KB Created: 2021-07-22 22:21:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ef5546782a53a21ab8b6a5d9b513497c SHA-1: 5d57724e42db61baa57c00d9dedf0c819da4618e SHA-256: 06ea830d7d5e528794b382c9d15b9b65be4720bcdb30486120ab6266394a089f
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 malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous compromised WordPress sites, suggesting an attempt to distribute malicious content or conduct phishing. The document body is unreadable, but the presence of numerous unknown URLs indicates a high likelihood of malicious intent.

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 https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ed4b840ff---55350842075.pdf
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/42b318e94fab88ffd89d47cca0b4b4ae/72060796666.pdf
    • http://namjapizza.com/app/webroot/files/65459529712.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/672159597275379ed88f4d5eedab1d2d/63754282539.pdf
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8621dcc815---wijag.pdf
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607559d1c7def---60310221199.pdf
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/7135d175e474096f07a3e7b593eb11fa/29941800825.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/72cqcuutg9boheh5e6p524mkn1/80766556200.pdf
    • https://artbynela.com/uploads/file/96237120652.pdf
    • http://scuderieverdina.it/scuderia/userfiles/file/42233440187.pdf
    • http://www.siposferenc.hu/html/41784765154.pdf
    • https://sinhadventure.com/uploads/file/26888303372.pdf
    • http://cn-noah.com/uploadfile/file/jerunizilababulos.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/c5c7333c7a6902b727c682f01d665e6a/jubatifamakebuwotugifapu.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160989fec439ba---pelotu.pdf
    • http://alumcity.ru/userfiles/file/5576906701.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16089dbb6e6b2a---sotugisoguxexotivizazufe.pdf
    • http://shreyaghoshal.com/konadnew/userfiles/file/77204454135.pdf
    • http://kamkmori.cz/ckfinder/userfiles/files/jizekosudesaxanazedeze.pdf
    • http://yakutiaprime.ru/SITE/files/editor/file/fowaninizoxogomi.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086b925451c0---lopepolirab.pdf
    • http://antonioruizabogados.es/userfiles/file/61699887358.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d023ad7583---59292775992.pdf
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/f8550c3dc8c516b9931f5964895ad35d/37974396447.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=tuition+class+images
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011d5f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D5F 16792 bytes
font_01_sfnt_off00013571.bin
665ccc836c269d521d12ae3c0ddf24a7788c27eb70bbdcfc794c3657d8520da8
pdf-font-stream PDF embedded font (sfnt) at offset 0x13571 15980 bytes
font_02_sfnt_off00015e8e.bin
42593fe6dc4c509b534d4c87e241e93697aed6d560da17cb5c28ff3965e1c189
pdf-font-stream PDF embedded font (sfnt) at offset 0x15E8E 10536 bytes