Malicious PDF — malware analysis report

Static analysis result for SHA-256 d47678614168f40e…

MALICIOUS

PDF

90.0 KB Created: 2021-06-28 08:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d643ec1a8dc08343227e33201ed93b0b SHA-1: 0c64c30c8e597bb6d03de0571cb1f9ea7bbd318e SHA-256: d47678614168f40e19cb2b585b7b05db9ad7fde036c389ee667cd443b16eb087
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised or disposable hosting sites. The presence of numerous URLs, many hosted on WordPress installations or disposable domains, strongly suggests an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://evpltravel.com/xv_image/file/kodukuxikujovo.pdf
    • http://namuvaldymas.lt/userfiles/file/jiwafozasipowu.pdf
    • http://huile-de-nigelle.info/userfiles/file/julufaruwajarowidofuvogog.pdf
    • http://stepasidemedical.com/images/uploads/file/rowuradaxixudakuvivo.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4298dfce0---5236335052.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085d15c57e91---88057430860.pdf
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/7ec8d11932ac476d82336cd16da1550d/mapadowuwezuvefipag.pdf
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071cbb3e1a05---xesidulabokugedar.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1cf9699494---xiwedogesix.pdf
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/qvh8f9gmuhegt1m526563jd895/67255908088.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/66earsqbd9mtivdtfbc32gmfd7/xaronetitavuvawumuxe.pdf
    • https://djennebeads.com/nbloom/fckuploads/file/polurobe.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607db0c7b5ec6---16841311349.pdf
    • http://qiangka.com/ckfinder/userfiles/files/takonojabune.pdf
    • http://kingalbertltd.com/uploadedfiles/file/97756497945.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d40aed2cad1---41198310483.pdf
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/2fd4c84af0c8a3bfebc2f96d13302023/litinanubisifezixenutali.pdf
    • http://gptools.net/userfiles/file/julizotanitikew.pdf
    • https://pellevah.com/upload/files/togijeferutupufexovaz.pdf
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c4c2de01c8d---wavaxonedamelovomano.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b53e8f4c6---jakesofutanelusinoj.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad686d5529---36964835018.pdf
    • http://hnkingdee.cn/Files/file/202162171442.pdf
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/4mkrju7dcdj1imgm2relca0ntm/fumidoveduka.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=how+does+buying+and+selling+stocks+work
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9fc.bin
f349cade35b66a3022e77f9100141296827b10492ac20010d5f239e94e40ecfe
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FC 17196 bytes
font_01_sfnt_off000126f0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x126F0 16792 bytes
font_02_sfnt_off00013f07.bin
20e5cfe4e3187c802d5420eec88f2ab75ac83d636b3a81738459a522eea176a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F07 11068 bytes