Malicious PDF — malware analysis report

Static analysis result for SHA-256 626ec08927f50c63…

MALICIOUS

PDF

91.1 KB Created: 2021-07-14 04:13:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 1d822c731f9c28a253ffc11c9884aa9d SHA-1: b9dd1b32e19a3b554a1ae5176732dd6b536ae3bd SHA-256: 626ec08927f50c63aff1cb046c56d6e829b1da964bcd978da4260f0b38e58362
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://cructi.ru/uplcv?utm_term=use+of+rose+water+for+face PDF link annotation
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/5b4f77a7d17da25b0cb7152ed524ffbe/gojutozalodizaxugi.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609858878466a---jizova.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160c1148713d9b---kutido.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16079adcc523a2---xiwipufebonedusi.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/26419375764.pdfIn PDF document text
    • http://maybomchuachay24h.com/Images_upload/files/gidigudizilefod.pdfIn PDF document text
    • http://gongotour.com/FileData/ckfinder/files/20210701_FBAA799F7C7CB79B.pdfIn PDF document text
    • https://zegabilisim.com/calisma2/files/uploads/nenunamabozupi.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/sajaxepalojug.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1608369e93968f---jawed.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607074e9e3aaa---52020909311.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608dcb799ff72---gagexunulex.pdfIn PDF document text
    • http://jaatkinson.com/userimages/66720379782.pdfIn PDF document text
    • http://drapa-technika.cz/UserFiles/File/30006883364.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a633af62ef6---37649672295.pdfIn PDF document text
    • http://rocb-ap.org/file_media/file_image/file/13102086361.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/86138f08693ff9976131c2d7dbbee13b/fotage.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/vte98ts7ge67ecc5noeh9iq3j1/65620481909.pdfIn PDF document text
    • http://kiddeefire.com/media/userfiles/files/75201958173.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/286aa7c6996d337d2605dee26d93c16c/79363618514.pdfIn PDF document text
    • http://perlawarmii.pl/userfiles/file/kuwivagopiguwir.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/gabosuxoforalagurasizo.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/5d6ea9ps48v6sjt6q3qkgbcpp0/sugatujefuserunelajudewo.pdfIn PDF document text
    • http://covinahigh1980.com/clients/1/14/147ee80f0cf2e08ca1b5067d21485a43/File/dejaw.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF5 16600 bytes
SHA-256: 245d1eda0937a73b7450767b4218a924348f1d26066864453e06940e4b6bf077
font_01_sfnt_off00011a35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001324c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1324C 10180 bytes
SHA-256: 92e8f8d0809799d1806fa5c52161f8a9740980141da9571cf0651bf0b9fd888d
font_03_sfnt_off0001495a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1495A 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd

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