Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d01c0614b6cb138…

MALICIOUS

PDF

74.6 KB Created: 2021-06-28 02:12:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: ba2df1f42f86ec8115a95f60922457a8 SHA-1: 26e37174b92666c215f3c8368ffe556acfecb907 SHA-256: 5d01c0614b6cb1388489651b81d110fc29aacdfae4ce8f5737abf9977124479d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious or phishing content. The presence of these links and the overall detection score strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://irlanc.ru/uplcv?utm_term=meaning+of+yet+to+come PDF link annotation
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/39hc83f4dnqotmbbnadtqkpdc4/vasejebavu.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/1ncg9o1u38e31g9pv1dprmq1cr/dubub.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c2726823bf5---sapakeselol.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/vewatowalogokan.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723fe02146e---67738411943.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/ch8o775c2g2j7cmg7fh706c5n6/widugipipabi.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/ccouf4e48b7etc39d7kv1rpdh7/67284433644.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/2480ae9773250b32cf7b2f8c83584ef0/gojatelopisuru.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/20215162224287816.pdfIn PDF document text
    • http://zoltysnieg.pl/pliki_wyswig/files/rowop.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad043d56aa---46004831658.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/91rn84kgvilsr816o3c0b92qfo/romoworumedore.pdfIn PDF document text
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/811jgvv6od5ijr4k1rd90jv6a2/45378146067.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16075a3c135532---ripunomusurek.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/3860e65150fbc5d81d3299f883d6f66c/zasemafotenatag.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/743ba34df663e6f92cebaf2392c4baa2/96188603037.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021051303103873499.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/86255729769.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/manuwodegavibudixam.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080927f65206---24742284731.pdfIn PDF document text
    • http://boxethai38.comupload/file/kodaxuwivurenabuzolumor.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087edcd268ae---25535872121.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/dlp1llcknpdg9v5dc5jok0qgrj/nupiluxamapi.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/73370eml9ffa4dk09bohdpt099/xuturemaj.pdfIn PDF document text
    • http://siembra.me/uploads/files/wajexus.pdfIn PDF document text
    • https://afayl.com/userfiles/file/fituju.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3AD 10472 bytes
SHA-256: 87e8e2c87586c727158666ca82e1543a571274b89e3d49c72353b7d61a04c7d8
font_01_sfnt_off0000db7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7B 16392 bytes
SHA-256: 8d59d87a5398c1bc9532462a6ac49e1bb6cc1309987a5912646f97ee61a6bcfa
font_02_sfnt_off00010520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10520 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1