Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1d44e39e3279f1e…

MALICIOUS

PDF

85.3 KB Created: 2021-07-18 07:05:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 27c99a5c1a3f29a801b5d2698a14c910 SHA-1: df40ee4999e6876981bbd5897e765aa0cfd4bdc6 SHA-256: a1d44e39e3279f1e6e943d922bd99c7ce3ffb4ca219ac7fc2ba3d77946dfe342
196 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised websites and potentially malicious PDF files. The presence of 'cmdog98/20808903380.pdf http://mankatomnclassof71.com/client' in the document text suggests an attempt to execute commands or download further payloads, aligning with typical phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/og1qrqvl2hdf30fidj2ncg5e0e/91397056160.pdf
    • http://ausafe.net/images/art/files/68575232601.pdf
    • http://indecomavo.pl/inc/vibeparilenabuje.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/ebf10c2be4cbe5dec44a725bb842b9ba/11360976392.pdf
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072fa27be83d---17341602673.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/a5778483cc58782fa991a3ce1ea37d19/36575675495.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607356edd81e2---86172189463.pdf
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160738da718d36---diwolokidikesewaje.pdf
    • https://mebelihome.ru/upload_picture/raseselikavives.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16094c9e129b8a---81403819803.pdf
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/xinoteberubumuk.pdf
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/6tkijchefli1fk67dlvcmdog98/20808903380.pdf
    • http://mankatomnclassof71.com/clients/e/e0/e0e8961458839910853a12af65841b27/File/xemeborifurovajarovepoki.pdf
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/li1qi0jvms3kb40mem3vufjcb6/18395142553.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/2f485b4098bb975978d24d1504732e03/85886295954.pdf
    • https://kuepancong.com/contents//files/17374721631.pdf
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1cda960e0---mujareralotuzerefap.pdf
    • http://jrpst.pl/userfiles/file/67934035206.pdf
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/5a0cad9d6c9e1977c155d7fc64064f39/lasepuvubukodejedoxupowof.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160840e2293c8a---lapanemi.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b659e429c85---vomovewapijezidutizen.pdf
    • http://sl-light.ru/design/img/upload/file/8582047232.pdf
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4582b1758---84959963255.pdf
    • http://alexdisinfestazioni.com/userfiles/files/matepimegub.pdf
    • http://mankatomnclassof71.com/client
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=bounty+hunter+discovery+1100+metal+detector+reviews
    • 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_off0000e7c2.bin
9d14155b104e99af47ea56b3570b4fa2f6ed6c1046316032f6f9bc410ba79993		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C2 11228 bytes
font_01_sfnt_off0001020e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1020E 16792 bytes
font_02_sfnt_off00011a20.bin
c27c8fab9258a96c6721b3979e92d95d6c28c12c3a12b3205d792cd8fc9a1c90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A20 17308 bytes

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