Malicious PDF — malware analysis report

Static analysis result for SHA-256 4095c06346774db8…

MALICIOUS

PDF

96.1 KB Created: 2021-08-12 21:50:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f029d324f7baa10299bd343379bfbd4e SHA-1: 3acbdc389c17f5c410a251e84e884d6b773b0c82 SHA-256: 4095c06346774db81f33fccb5dfbe317d223a8baae0724f3a7b8813b2b45b8b5
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, including one pointing to a raw IP address, and is structured as a link farm, suggesting it's designed to redirect users to potentially harmful websites. The presence of these links and the overall structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://huntic.ru/uplcv?utm_term=game+hacker+3.1+apk+download+no+root PDF link annotation
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c6d518c76---86875296949.pdfPDF link annotation
    • http://ayurveda-shiatsu-nice.com/upload/files/24348875441.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/c9d69a332812f94afffc425d7199502a/bakijaviras.pdfIn PDF document text
    • https://pubs-icfas.org/icfas_new/dev/ckfinder/userfiles/files/majazaro.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/nujitavojobinokamuzod.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/lblnbtb1m7ip20d0bvs08bs2jo/15846298824.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d2df18e82---figimipadorufidub.pdfIn PDF document text
    • http://www.salac.cz/ckfinder/userfiles/files/lobirejevugedugerap.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/82666823038.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/33438507434.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae728b6b4ca---filunipirenozila.pdfIn PDF document text
    • http://xdata.pl/app/webroot/img/ckf/files/98478156720.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/mumosirofevo.pdfIn PDF document text
    • http://cokhibaosang.com/media/ftp/file/gunewebogatoj.pdfIn PDF document text
    • http://kkc1.org/htdocs/cljr/data/files/23065683123.pdfIn PDF document text
    • https://www.pelicanfinancialnetwork.com/ckfinder/userfiles/files/supelinekov.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/284c427547c6885bc99e6650554d5838/23602871268.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a68d5b13eb6---wasesonemozufelexerako.pdfIn PDF document text
    • https://777mto.info/contents//files/12260004655.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/wixerurezufap.pdfIn PDF document text
    • http://gruppocinofilomarsalese.com/userfiles/files/jatibilawaludoxepo.pdfIn PDF document text
    • http://berries85.com/clients/4/4c/4c86f126b1006e50d570d35f0f20b0f3/File/42196948542.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/26671190721.pdfIn PDF document text
    • http://aimic.com/userfiles/file/rafipodakenobu.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160be68ea1ada4---tedumawadutan.pdfIn PDF document text
    • http://dblbtech.com/userfiles/file/makunevu.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_off0000fb24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB24 11028 bytes
SHA-256: 5a17ad902b998cf1a025beed02aded79744e78c22a1e74ec0d42cb5cc36a2a14
font_01_sfnt_off000114c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012cd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD4 17920 bytes
SHA-256: bbfbe802dfe29ae59e8d019b3cec4c20fd3e12fd295b4491dc5d294530f23cc9
font_03_sfnt_off00015c06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C06 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd

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