Malicious PDF — malware analysis report

Static analysis result for SHA-256 3770eef391b36adb…

MALICIOUS

PDF

85.4 KB Created: 2021-09-12 03:10:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 01204bd5b6bda2bb5172e67b4a4e93cc SHA-1: df23ea6f035089b8ef2847a2d9eec73ec175cf7e SHA-256: 3770eef391b36adb3e6a7374461f14ad3ae9d8327bf84f7071bdead8240a6b26
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded links, with one directly pointing to an IP address, suggesting an attempt to redirect the user to a malicious site. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of multiple links and the IP address target strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161318a7f49ad7---36231067301.pdf
    • http://botroul.be/uploads/51862133071.pdf
    • http://purepoem.com/resource/docContentImg/file/2021-09-09/4d0316f258ef1d51b6af0dd7430e91a2.pdf
    • http://niezapominajkowo.eu/userfiles/file/damakobobux.pdf
    • https://muguet.fr/sites/default/files/file/xijaparibomeketurorevaz.pdf
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/0531036dbb5f4229c93dfce072ec7688/gaxulujite.pdf
    • https://kristinanamaste.eu/files/46078298664.pdf
    • http://gzcaifeilai.com/ckfinder/userfiles/files/202109081556036268.pdf
    • http://turatabor.hu/media/bupikupi.pdf
    • https://npkfertilizerproduction.com/d/files/wukololeridaramokog.pdf
    • http://oiseau-bleu-morzine.com/userfiles/file/betuj.pdf
    • https://membermimpi.com/contents/files/24037580071.pdf
    • http://upakuika.com/img/file/gedaxawebipujurogap.pdf
    • http://xn--krmer-dnnebacke-1kb72b.de/files/file/fuzejafoladigo.pdf
    • http://rulife.ru/ckfinder/userfiles/files/30370694699.pdf
    • https://takarasushimn.com/userfiles/files/zurikilebokumilid.pdf
    • http://xn--djr00fsyfv0o5qgy9u.com/filespath/files/20210903102020.pdf
    • http://willowslakerhea.org/userimages/36527785522.pdf
    • http://ankaraeksioglu.com/resimler/files/64431928504.pdf
    • http://185.33.116.145/~acus01/upload/files/kekexuded.pdf
    • http://bookblog.kr/data/file/files/tiforow.pdf
    • http://qishuochem.com/siicea/userfiles/file/34620255397.pdf
    • http://ig-einheitsloks.de/medien/file/xetotaxapovewixuzovesis.pdf
    • http://studiocastigli.eu/userfiles/files/89774955088.pdf
    • http://radio-salsa.com/php/rs/filesupload/file/698325792.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+play+ps2+games+in+android+phone
    • 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_off0000e84e.bin
693355c4cebf2eba18b0555eaae16a72d30324fd143b24f48ce45a72fb5d93a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE84E 11152 bytes
font_01_sfnt_off0001020d.bin
c9ec7e8ef17cc15101f8427d6763c7935209ae090882686a6542019c7ab003f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1020D 17788 bytes
font_02_sfnt_off00012f73.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F73 16792 bytes

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