Malicious PDF — malware analysis report

Static analysis result for SHA-256 0552a734d4a1fc4f…

MALICIOUS

PDF

81.4 KB Created: 2021-09-15 16:55:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ec57d215c26a10901eae911b9423fd57 SHA-1: da673f8ad7f50e4ca2b3bd347c45110600f93a18 SHA-256: 0552a734d4a1fc4f35328ec1ca9df4ef3d6bc9d587213f859fcbfee28f5be16e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document contains multiple links to disposable hosts, suggesting a phishing or malware distribution scheme. Although no scripts were extracted, the presence of numerous unknown URLs points to a likely attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://rgn2u.com/userfiles/files/80284203109.pdf In PDF document text
    • http://cungcapbaoduongcuanhatban.com/upload/files/kegexevikasokoviwuvazorus.pdfIn PDF document text
    • http://eptesteplelek.com/uploads/file/6591021352.pdfIn PDF document text
    • https://stormester.no/files/file/vobiwegezijes.pdfIn PDF document text
    • http://nfc-lampang.com/user_img/files/tunejirivamigasatugugu.pdfIn PDF document text
    • http://briquettemachinery.com/d/files/vezuxitujabibovaf.pdfIn PDF document text
    • http://umrllc.com/userfiles/files/9197509030.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613964862bc39---22094312413.pdfIn PDF document text
    • http://giteduguedesboires.com/userfiles/file/69043184713.pdfIn PDF document text
    • http://0225674989.kad.tw/kads/ckfinder/userfiles/files/vegod.pdfIn PDF document text
    • https://hobbes-group.com/upload/files/danoworilubelipawini.pdfIn PDF document text
    • https://dallaslandscapedesign.com/media/files/71495311584.pdfIn PDF document text
    • https://anctools.com/ckfinder/userfiles/files/datore.pdfIn PDF document text
    • http://fzcce.com/aimgs/uload/files/moliwebijorewek.pdfIn PDF document text
    • https://livres-arts.com/ckfinder/userfiles/files/viputaxetepanezugivavu.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/sijaguz.pdfIn PDF document text
    • https://gilbertems.com/videos/file/94515867088.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=names+of+all+the+gods+and+goddessesPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE7 10584 bytes
SHA-256: 8d83a77f4129d084fee7b328772e45cd487e28c549f160a91269537abf563859
font_02_sfnt_off000107b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B0 18928 bytes
SHA-256: 87fde4a8363c4348956d8e2241c1bbab4196c93f16da80c89b10d140fc2bf3b2

Open this report in the interactive analyzer, or submit your own file for analysis.