Malicious PDF — malware analysis report

Static analysis result for SHA-256 1af69a8c9dcfb80a…

MALICIOUS

PDF

94.7 KB Created: 2021-08-08 16:18:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 5831a2670c3de75929706a41fd12a0c3 SHA-1: fd524f3af2e8d5382d3e4e025a3aa23db13f9c63 SHA-256: 1af69a8c9dcfb80ad97e54005a6a8dec198d0873e343baf006d76744ffa39fff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing campaign. It functions as a link farm, directing users to various domains, some of which are compromised WordPress sites, to download files. The embedded URLs suggest a lure related to cracked software, indicating an attempt to trick users into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://infrive.ru/uplcv?utm_term=shiginima+minecraft+cracked+launcher+v4.400+download PDF link annotation
    • http://cn-daomeng.com/upload/userfiles/files/d0ef1de220c57e7b68ab6ef3b6a6aabc.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/dafige.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c3cbac6ec---45780135110.pdfIn PDF document text
    • http://barnesfamilyre-union.com/clients/52050/File/44755507114.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160e8550d4803f---47236366289.pdfIn PDF document text
    • http://cabin4kids.org/clients/0/05/050cd0fff5f75fdfd14851583cc0de74/File/36009365625.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/39063511329.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086fa7184023---79886370791.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb8bf68c17---kafewok.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/44680d40529b333839bf27688b7a8bad/puwokopise.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/df25c9f5a71c23f23172d9c179fae18e/35319048877.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db72e65c850---67720307224.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/6ba61cf21e1c180bf395048cbecc411f/maliriliw.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/33423718008.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a2897b11951---51230269694.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-6-10/20210610013002614242.pdfIn PDF document text
    • http://prmakeup.com/Image/files/kuwukokoniseleriti.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a07739230---jakanupilukurixo.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a25cab6dd03---mapukuta.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/b350f4ca282b15a9187b5370769e3a9d/17123805914.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4712a80577---regateramubonanubav.pdfIn PDF document text
    • http://greenld.com/userfiles/96867951952.pdfIn PDF document text
    • https://bibliotheque-des-arts.ch/ckfinder/userfiles/files/48587159430.pdfIn PDF document text
    • http://hifitness.hu/userfiles/file/58872743633.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF321 6100 bytes
SHA-256: bb6e6239d3e5ce5ae5f3e200ba1ed3bd744a7a7e5cbddf5252fd0bf8e6eb2ed4
font_01_sfnt_off00010825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10825 11440 bytes
SHA-256: e0ba457477bdb73dbc32af09dce3eb5a751bf68d484c25b91041266fe97a1b88
font_02_sfnt_off000122e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013af3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AF3 19744 bytes
SHA-256: a4d7545186c84dfda5bd53884eec437e4d047c3ff6a9eef9458755613ae6fd40

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