Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f6fd5b6823f94a1…

MALICIOUS

PDF

87.9 KB Created: 2021-06-28 05:07:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 69a2c9ed9df8fbd854eb533d2cd2fac7 SHA-1: 52167a579ccb977487fcc2f07073fe0eb50d5c65 SHA-256: 6f6fd5b6823f94a1af4c71919ff55a138491a23e79e57eb01ab215a3b271268e
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to numerous URLs, many hosted on compromised CMS uploads and disposable domains, designed to redirect users to malicious content. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics strongly indicates a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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 https://clearpatth.com/userfiles/file/18960845870.pdf In PDF document text
    • https://xlspandoek.nl/userfiles/file/teterigukizotigebu.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070fb496c8b6---masiterafexelokatez.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4eb19f01c2---vawelitizovek.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a35b47d5405---sedoxibamafarawo.pdfIn PDF document text
    • https://gw21.ch/uploads/userfiles/file/dixarijexinewog.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/d53418d8bf769058fbe60a315a75886f/90857409295.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/vbci8034nn5eecpusg0g73a056/49802945025.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/aaed50af65d80e8b3dcaff55a48a8890/50869166659.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160bc4b7b61e92---zosovoviwida.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/8pkbcpc82v1e600tc9q4l3ct7h/voxetavatixubedarev.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/fekerigosojipamapeki.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/lupina.pdfIn PDF document text
    • https://hyundaia.ru/userfiles/file/ravavowa.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/18337d68d41cd32b3f1d8ee42170ace1/wolutubusologusinipu.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb96472844---dixebetojinenoselen.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c8dd2251df---rozifenoderorejadij.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/c4f1bb0ba9078f55084cf1c7ed6ea093/xugilukofasabe.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/c509f96a556fa7ad31af9c0254f83431/livujalozetukebegan.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1ccc6a128e---5373431403.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160927ccdd9971---tawivoto.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16094676a48cd7---97619918058.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a94c44ea41d---31648729230.pdfIn PDF document text
    • http://ekonopuntos.com/campannas/file/nulinavedotaxawidatakak.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160709085dcfdd---67706937186.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=fox+in+socks+pdf+with+picturesPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB60 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF377 10864 bytes
SHA-256: 9f4f2b9343ab8ac919659aeeecdb0a76afb651fe450a78a798cee8152dd8f165
font_02_sfnt_off00010c9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C9C 17528 bytes
SHA-256: 0865d04d029ebd7e32f283c6ec2f9daf5073afddc079f22de3462d7abea373a1
font_03_sfnt_off00013a15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A15 16864 bytes
SHA-256: 9649f322019db8883f9772a0b12ecdd532e7a34c40a1eb925d7299d008c76e48