Malicious PDF — malware analysis report

Static analysis result for SHA-256 7742574e40472284…

MALICIOUS

PDF

98.9 KB Created: 2021-06-30 10:10:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 745e30311896fc97c6a34cd7c61ce451 SHA-1: 19823bd3962f73587033701495745706dcd571d7 SHA-256: 7742574e404722846484573135454671c6cc5d521852840e418a00360ff5b3d2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to compromised websites, likely intended to trick users into downloading malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9739

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 http://sushibelovo.ru/files/juboburitera.pdf In PDF document text
    • http://bomtvplus.com/data/board/file/20210619043108.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a95ba1e0699---2041827458.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/pm754mnrtp4kl2gmcri5ccee40/daxatoduvutegorum.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/sititamadimu.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/aa045b2eef8122526b72ed98f35d5d2e/pularamuwuvonedine.pdfIn PDF document text
    • http://ibtaker.ps/userfiles/file/44648939108.pdfIn PDF document text
    • https://mt-creativestudio.com/ckfinder/userfiles/files/tetoxokedufe.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607d31db17e2c---48699414082.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16083729ee2bfd---81162110945.pdfIn PDF document text
    • http://basaritarim.net/admin/editor_resim/file/safamipijetasanaxobovor.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d885582c6e4---zerapofimir.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/3b58lrhr7useb8ea6slb70jgsa/31517629071.pdfIn PDF document text
    • http://ypdtools.com/ckfinder/images_store/files/toxipufutatabotexuviw.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160741acc73131---lasezokodowenigazifovalum.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/tqh6j7l0sviqqo8vmblonmg2h4/kikosojalanumijosased.pdfIn PDF document text
    • https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/e76a78a901c310ff6afe122ba3feb875/kitadevi.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/dd0b484aa38b83573ac49536113fde73/77713952178.pdfIn PDF document text
    • https://dnmpaint.com/sdcc/images/file/fijesebijofuduki.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160757c15cbb22---zaneviradanalalafokiv.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608c11fb09fc8---dorodaguposapa.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/hfuc3rmehgglqb8e9017r99qe3/30280453141.pdfIn PDF document text
    • http://architettoseneca.com/userfiles/files/febefidemuwiguzezofazo.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16089d4d64226e---mutefo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=download+game+gta+4+ppsspp+iso+androidPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF164 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10943 984 bytes
SHA-256: 3f6169bed47c2a3237fdf18f1b5257a177d0d2adc7428dd5ee1729e63eadeaa7
font_02_sfnt_off0001107a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1107A 10900 bytes
SHA-256: c06420470188c1e87212d3dd3d1b0939e6857c9c5e5151d99a1aa52d0c5b83a4
font_03_sfnt_off0001298b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1298B 21636 bytes
SHA-256: 6debea8aa2e006d6770922766de4609011520fa98ff6b06e1b5f0bae8bb1a179
font_04_sfnt_off0001631b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1631B 17980 bytes
SHA-256: d205ba43583d6f901f7f4a20f82f711144fedde071009c6eedc37fa3cf5351cf

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