Malicious PDF — malware analysis report

Static analysis result for SHA-256 49bfeb1327199a82…

MALICIOUS

PDF

84.3 KB Created: 2021-09-11 04:14:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f43eb332797ca7b3d7525ec647e4b928 SHA-1: 3ab63a0cd8f3cbe370385b3b8122989f0f4ee09a SHA-256: 49bfeb1327199a82e40565bb7c74f5add64b29bf1fd9cbc79d4dbf764f2cfad7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to host malicious content or redirect users to phishing sites. The presence of multiple external URIs and the nature of the hosting indicate a likely phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/161383ad1788af---xenaritasene.pdf In PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/nododo.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a890f595dc---nasosoninomodup.pdfIn PDF document text
    • https://hattoco.vn/images/ckeditor/files/vuvuzigemibe.pdfIn PDF document text
    • http://www.atccs3.it/atccs3/fckeditor/editor/ckfinder/userfiles/files/92531051935.pdfIn PDF document text
    • https://anandamsanyal.com/userfiles/file/xesidogogerilekotasutete.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/14105951833.pdfIn PDF document text
    • http://vijyaiprismcrm.com/userfiles/files/botulezibikok.pdfIn PDF document text
    • http://suncitygroup.ir/basefile/suncitygroupir/files/bomoxesidagow.pdfIn PDF document text
    • http://eluvial.com/sites/all/sites/eluvial.com/files/85587330213.pdfIn PDF document text
    • https://noursportevents.com/wheelmarine/userfiles/file/bapogixijid.pdfIn PDF document text
    • https://brawlcall.jordanadams.com/ckfinder/userfiles/files/xilijegawinevomovab.pdfIn PDF document text
    • http://cocoon-source-harmonie.fr/public/file/musavupofakizalonami.pdfIn PDF document text
    • https://atasuorganiktarim.com/upload/ckfinder/files/80266908824.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a9674c530a---83098438429.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/65438489682.pdfIn PDF document text
    • http://mentor-tutor.com/newGroserLikeProject/uploads/files/64590961014.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/fawijepapebogogaviriti.pdfIn PDF document text
    • https://godahoian.com/app/webroot/upload/files/kekivali.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/panamekisapimidusebodek.pdfIn PDF document text
    • https://sporyolu.com/resimler/files/ropimili.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=android+auto+app+google+play+services+not+workingPDF 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_off0000e020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE020 11128 bytes
SHA-256: 061c72ef6ba8307ccddb34d86c61b963fff34760a39954831a47ed00e8855658
font_01_sfnt_off0000fa1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1C 18796 bytes
SHA-256: f15abcabef347a85745cacc9f44ebd9d3273eda2700a9526cf94d3246d58a479
font_02_sfnt_off00012add.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ADD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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