Malicious PDF — malware analysis report

Static analysis result for SHA-256 d54c9c26b6039cad…

MALICIOUS

PDF

80.4 KB Created: 2021-08-15 11:22:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1286f8ba03defd98189fc112032652f0 SHA-1: 7c9548a1ec29dbec5356a6fd102fd4f62c8b58d6 SHA-256: d54c9c26b6039cad8544d910495e53b736d8ede3656958ce6725c1dee8b58baf
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple disposable domains and compromised CMS uploads, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body is heavily obfuscated and unreadable, providing no further context on the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://smidgel.ru/uplcv?utm_term=eve+echoes+pvp+guide PDF link annotation
    • http://donateagift.eu/userfiles/file/93821973332.pdfIn PDF document text
    • https://tonymusic.se/UserFiles/files/15542539033.pdfIn PDF document text
    • http://autofox.lt/ckfinder/userfiles/files/disewuzumopoz.pdfIn PDF document text
    • http://donationwebsites.com/clients/6/68/68901b9e08e997a22fc64c74502b39ca/File/60339247081.pdfIn PDF document text
    • http://ucity68.com/clients/e/ea/ea220da86df44fb0ae3b7c8e8295ccc1/File/17229503768.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c52cdec1f74---zegujutegor.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/06d0faafba8e715485067b7b38f5609a/visatonugitisipubagu.pdfIn PDF document text
    • https://www.nevjegykiraly.hu/userfiles/files/sigilufugu.pdfIn PDF document text
    • https://www.kcequipment.com.au/wp-content/plugins/super-forms/uploads/php/files/3e62993593c158403d15cdbacdbaf3ac/toser.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160db6a46d6d91---41342816014.pdfIn PDF document text
    • https://fajanav.com/aym_image/files/rowinegadaremiv.pdfIn PDF document text
    • https://accounting789.com/ThImg/file/wemugedijum.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/kewin.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/75262890989.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077447e1e7aa---muwegi.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/f1ac80d16411ff3fd42fd4b10ba30e44/xozunaropu.pdfIn PDF document text
    • https://togeltop.net/contents//files/laferonezowepaxepiduz.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/87056735669.pdfIn PDF document text
    • http://dtpokebar.com/uploads/files/87682126389.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/67803581719.pdfIn PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/90745333489.pdfIn PDF document text
    • http://daotaonhaccong.com/uploads/userfiles/file/61293583516.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/fd7n8kdmrp9bevb9nodkfunrpi/joralimamote.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c85ef7bf14e---10358356361.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_off0000daa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BA 16308 bytes
SHA-256: 55d3fc99dff62219504b70507d0187aa9c5111ffceae20a5b51e51ccc84ac1af
font_02_sfnt_off00011cec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CEC 10432 bytes
SHA-256: e62bd110d9f54fa2704834bed24864ba6a5d15eb6b371715d7d6093d8f90173d

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