Malicious PDF — malware analysis report

Static analysis result for SHA-256 37e507530dba54de…

MALICIOUS

PDF

79.4 KB Created: 2021-09-19 03:49:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: eee373ef27047ca77e970d141f9712a4 SHA-1: 49a6eee07979a4401db3f491b278a5e847d12576 SHA-256: 37e507530dba54debeee2bf98644a90031ffd8b96f9f99f6eb6e222f675a1cee
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains an embedded JavaScript stream and numerous URLs, many of which point to compromised websites or disposable hosting, forming a link farm. The embedded JavaScript likely facilitates the redirection to malicious sites, contributing to the phishing or malware distribution goal.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=after+we+collided+ask4movie PDF link annotation
    • https://etadelloro.it/images/file/19289706823.pdfIn PDF document text
    • http://artiguardia.pl/userfiles/file/gilogonijifunuzofogujo.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/16139f75279b91---58247943827.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/54b39b31505f2e9855ae76f2b9e233a3/pekenex.pdfIn PDF document text
    • http://proallprint.com/userfiles/files/kovutirokabe.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/2da6d4600e86ddd9634abb322c963c63/24233014451.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/161339001d8990---83595897221.pdfIn PDF document text
    • http://stihoplet.by/upload/editor/files/pipoba.pdfIn PDF document text
    • https://davidfoleyinc.com/userfiles/file/notutefaxajezawebaweje.pdfIn PDF document text
    • http://sinsg.com/files/fckeditor/file/29105144111.pdfIn PDF document text
    • https://tranhtreo.com/images/ckeditor/files/tukujokunixorilawutixux.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16130543a442e0---21249169909.pdfIn PDF document text
    • https://rpdev.org/ckfinder/userfiles/files/31418891633.pdfIn PDF document text
    • http://laptopcuhaiphong.vn/upload/files/8408061525.pdfIn PDF document text
    • https://limsurdua.com/contents/files/12842824978.pdfIn PDF document text
    • https://infotechloyalty.com/bot/ckfinder/uf/files/lamujifosavidibik.pdfIn PDF document text
    • http://foto-recepty.sk/images/fotky/65419423648.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1613714bbbae3a---nopirevinadurirozibajir.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/durefoloruwa.pdfIn PDF document text
    • http://cyuanmei.com/userfiles/file/84467357523.pdfIn PDF document text
    • http://museodegliarazzimarsala.com/userfiles/files/49428719941.pdfIn PDF document text
    • http://tipkeo.com/js/ckfinder/userfiles/files/turojege.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/xekalobupupujiwisu.pdfIn PDF document text
    • http://ieltsadd.ir/cache/fck_files/file/96978519165.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/28025274324.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_off0000d0f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F2 10836 bytes
SHA-256: 7f489880728ed99084b90fa0ca4d94daa2a8864eb27422397698f100b977873e
font_01_sfnt_off0000ea20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA20 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10232 17488 bytes
SHA-256: abbe155cbc5e7e284f5670e967ddcbb4680442ccecc05f178d6e99ab0e0b7be8