Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe6584f74b7bc128…

MALICIOUS

PDF

85.3 KB Created: 2021-07-13 11:41:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fbb9ec7064f7d9f4cec605db3b19445a SHA-1: 9ae5566b0cdec066ad9ab5995556b78b45972650 SHA-256: fe6584f74b7bc1284fbfef40d7c6286003a8cdd0d0acf1f6247d458e09880f0b
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload storage locations and other disposable hosting sites. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/582517562cf556e1e5a5ce8b8706ba1a/zuxijavofevi.pdf
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/begezewipi.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/vjtdhno47tfotd323j627g455j/38057572046.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b53c95b7006---kudiloteja.pdf
    • https://serwisnawigacji.pl/userfiles/file/89238647793.pdf
    • http://asokmontridental.com/userfiles/file/31417227627.pdf
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/8b2bb9debf1dcabb185ffab9ba6fc05f/12748585469.pdf
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b9b553ef4---folujede.pdf
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160742d2a3c029---20735623823.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e80370dd74---47603358530.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a814f61cad1---90465447592.pdf
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/4f3a965956eae41f11d496a7b4d2b285/galexikofojunoper.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16075359962c90---56950895329.pdf
    • http://altelaw.com/uploads/image/file/38597663063.pdf
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb0564b8e33---wivitukinubilowukulup.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b9f83e96c---5254721665.pdf
    • http://hnysft.com/d/files/zupifokelevevejusefagejeb.pdf
    • https://petkasem2hospital.com/images/upload/userfiles/files/25503557389.pdf
    • http://ladue69.com/clients/876446/File/zewozubonaronimorat.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606feb51cfbcf---96145077058.pdf
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/mejavag.pdf
    • http://avandcie-energy.com/ckfinder/userfiles/files/14144633491.pdf
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/6nu4j0ub8fm1glvugdpnanvo8m/29072349973.pdf
    • http://gayaarchi.com/userfiles/file/20210522202402.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=select+reading+second+edition+pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6f5.bin
4b0b0f5dc3598e207c7a7b7da4bb4d4fa40c6ce5ca9929c47b67a2fdf72247b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F5 16332 bytes
font_01_sfnt_off0000f1ad.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AD 16792 bytes
font_02_sfnt_off000109be.bin
cbccf3e5556f0b0d5da410fe0230491a4335c121fe3653176ea13571fd632e8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109BE 21552 bytes
font_03_sfnt_off00012e82.bin
b6df895d0ea493f825bc1a014c6f9416a9842a190a8f86cef64bfe3d85fae484		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E82 10868 bytes

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