Malicious PDF — malware analysis report

Static analysis result for SHA-256 2926cc41aaa023f9…

MALICIOUS

PDF

86.6 KB Created: 2021-07-15 13:24:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 8075c8b1a649ba5ab7a12fdf8e4ea6a1 SHA-1: c33ed667a5d0534bdfe63804d40e4eb196e151c3 SHA-256: 2926cc41aaa023f9dcc19742f50d7fc7507857adc585cb90d010c0ad8c7f669c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing campaign. The presence of ML and ClamAV detections indicates malicious intent, likely to redirect users to malicious content or facilitate further compromise. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 https://huntic.ru/uplcv?utm_term=prince+philip+funeral PDF link annotation
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c09983b699b---80146759243.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/bokofipuzugabusiluko.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16082911cb7275---kejowavigojuvofokijixabik.pdfIn PDF document text
    • https://diphong.com/uploads/92820117228.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/3e8a8e70d535b768d78b8599a07c7543/golusoladexep.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/73177022931.pdfIn PDF document text
    • http://huiking.cn/uploads/file/111834136781.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/9ch5drep7hh31q5q25tr0cqcg1/63120363114.pdfIn PDF document text
    • http://gillsandgeckos.com/userfiles/file/pitanutigesudukibijujik.pdfIn PDF document text
    • http://acudrved.com/ckfinder/userfiles/files/ralodafutekok.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607462480e5ac---5020811552.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/girajurivatabakujexotul.pdfIn PDF document text
    • http://indianaquesters.org/clients/9/95/9573c8d6e108c9729a37356986dd5b5e/File/34247417993.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a37f7f61e86---29389050432.pdfIn PDF document text
    • http://expresskaliski.info/file/suwajo.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607043cc32dec---furakovigori.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/22807345314.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/q3u4ub34j4r3tf7v4t6crtb264/gotakowibeke.pdfIn PDF document text
    • http://cateringkieuan.com/uploads/userfiles/file/sisibomasibu.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/ajq0kv66tu1e6l6fujo264bepe/66960680290.pdfIn PDF document text
    • http://wanyuantemple.tw/userfiles/file/dazorokakibojumap.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/32533239045.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081849dac0d2---xasaxeliwiwupogukidi.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/h16cb457vbcplcvqfphnlvilvj/76237210990.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/70997487518.pdfIn PDF document text
    • http://dongphuctqueen.com/upload/files/76341479672.pdfIn PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/25698116555.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_off0000f13b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13B 17132 bytes
SHA-256: 5018b368a8fa350026fb5e6cd5f0a44bbb70360228ed8bc454c89391ad83a710
font_01_sfnt_off00011e17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E17 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001362e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1362E 10292 bytes
SHA-256: 989e650068afc71156ab0bb94fc081f8bba51cdf175095816dcae5e4de8e9e6f

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