Malicious PDF — malware analysis report

Static analysis result for SHA-256 c59cf64646497483…

MALICIOUS

PDF

80.7 KB Created: 2021-09-05 20:37:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e00be452ceed8f98caed2dc95d291f4c SHA-1: 689ce76fd79f8f07e5cf89ade3ab7f534cccada2 SHA-256: c59cf64646497483f00c845e6b17c55d0fbe326baafea8f689ff966c25abaf96
156 Risk Score

Malware Insights

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

The file is a PDF identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many of which point to external websites, some hosting further PDF files. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm on disposable hosting, suggesting an attempt to lure users to malicious content. The presence of multiple external links and the nature of the heuristics point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://101eyewear.com/luutru/files/rijizo.pdf In PDF document text
    • http://abnicum.ru/files/file/44469112895.pdfIn PDF document text
    • https://hyundainhapkhau.vn/upload/files/tedisozemovixuxove.pdfIn PDF document text
    • http://snap-drone.com/userfiles/file/wonolinolileterukajudava.pdfIn PDF document text
    • http://saopauloairporttransfers.com/ckfinder/userfiles/files/wevonerebo.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/cb615eea0279a0663f8aa7286311209a/49316715533.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160c77c5acc8da---tudukezijofoguj.pdfIn PDF document text
    • http://doyen.cc/images/upload/File/9425209120.pdfIn PDF document text
    • https://vanphongphamhienluong.com/upload/files/jiveguropunubogizifo.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/watasosajojafajitiwokuf.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8dafb11a0---68586933321.pdfIn PDF document text
    • https://nhatngudongkinh.com/upload/ckupload/files/18274497140.pdfIn PDF document text
    • http://cayxaotamphan.net/userfiles/image/file/fokixafalurozukaxeb.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/51926612457.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d837cdeacf3---jawabemegawobiwivekiwe.pdfIn PDF document text
    • http://topoint.cc/userfiles/fckFile/20210901010843.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/tizonozewuvop.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b803ca750bd3e35c33d98776ffaebb9c/masalug.pdfIn PDF document text
    • http://mientrungpetrohotel.com/users/files/xufinuxatukusulapisefulev.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160d5bdcad5da9---23583077247.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/27179500332a42f663ea7cf1b436eb52/95565330469.pdfIn PDF document text
    • http://mamaskitchenorder.com/uploads/files/rasivaxilolaturowixawum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=outlook+2016+manually+archive+calendarPDF 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_off0000d5ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5CE 11324 bytes
SHA-256: 616d94b61c40c6b9bbce93bb19f89b281448dd0e6d8071b2d135d89eb4ce6d8f
font_01_sfnt_off0000f061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF061 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10873 17424 bytes
SHA-256: a7ea7547169d6c773c8616829ac04d60dfe40957483a4f891af932240325fcf7

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