Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2a859d7b1b89500…

MALICIOUS

PDF

81.0 KB Created: 2021-09-05 07:03:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0a662e56b0e1510db86ba4d7368974de SHA-1: 95685557ef28f0f829c7699d6700c17b2e4e34bc SHA-256: e2a859d7b1b89500aafc04f4bf6beacfd0ef460dc62407f9b59f5b578fd1cb1a
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to various domains, some of which appear to be hosted on compromised CMS platforms or disposable hosting. The primary purpose seems to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://pixomot.ru/uplcv?utm_term=star+wars+edge+of+the+empire+beginner+game+pdf PDF link annotation
    • https://ribaczpeter.hu/files/file/turojarojegonupepemado.pdfIn PDF document text
    • http://webcertain.ca/contentupload/fckeditorUploads/organization_/file/39062362083.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/gujetawu.pdfIn PDF document text
    • https://guclupin.com/calisma2/files/uploads/rukaleruwevakiru.pdfIn PDF document text
    • http://xn--80aikni6a0b.xn--p1ai/images/file/49021457345.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d9d9e1a25---rukow.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/6c3427e300d432931338546665e47a3f/munavolevibofadejase.pdfIn PDF document text
    • http://grupposcorcia.it/userfiles/files/96497373104.pdfIn PDF document text
    • https://digbijoynath.in/iisc/ckfinder/uploads/userfiles/files/16564256172.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ffab2d4ff35---82383235651.pdfIn PDF document text
    • http://ibtaker.ps/userfiles/file/ginejikiwan.pdfIn PDF document text
    • http://locthanhroyal.com/upload/files/98711287784.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/f1398k6cv8dt2iatvnqm969rlf/85581762612.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/2qt49kv1so6rcg7sqbnk3pp1th/diwikovowijexetiratobin.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16112883630821---liwafoparigepemubed.pdfIn PDF document text
    • http://expresskaliski.info/file/60029763879.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608b808bc0165---jabitoju.pdfIn PDF document text
    • https://queensflower.nl/clientfiles/52394855884.pdfIn PDF document text
    • http://uniquecharacters.com/upload/files/17591879582.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/t10r39mk4fgf34iu1iovpuba1f/tajif.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e27d6fbb02c---toxubezikowuponuvanatepu.pdfIn PDF document text
    • http://kaus21.com/userData/board/file/22952707838.pdfIn PDF document text
    • http://havefuntogether.com/image/upload/File/77823895635.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_off0000d8cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CD 11200 bytes
SHA-256: b73e64336acdc0d87cdecc3eea5b5b500516ca48afb7c1a7c6bcfd89e2ba9a44
font_01_sfnt_off0000f26a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7C 17052 bytes
SHA-256: 2eef14d4e278862c17a4862a2d90f5b0346af80be1b962da528455469998bcda