Malicious PDF — malware analysis report

Static analysis result for SHA-256 f70735c198dc0cb5…

MALICIOUS

PDF

82.3 KB Created: 2021-08-23 03:42:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f8d948d6a023c35e49eedca4bbf5cf01 SHA-1: 0986f83c55aa2233539c1a8c6badd9177179e173 SHA-256: f70735c198dc0cb5eb1c1ab286cd9ee94c00ad48c8d938f88a4c99f853592095
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file 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 ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://coretry.ru/uplcv?utm_term=serial+para+microsoft+office+professional+plus+2016+gratis PDF link annotation
    • http://infinijewelry.com/userfiles/file/nakikonijigopa.pdfIn PDF document text
    • https://suma.ca/upload/editor/file/bosapikagelajorusezogebif.pdfIn PDF document text
    • http://asahiru-ban.com/files/files/68568934706.pdfIn PDF document text
    • http://daydreamspin.com/userfiles/file/99343911646.pdfIn PDF document text
    • http://maristaslardero.es/userfiles/file/jikim.pdfIn PDF document text
    • https://www.bnbtravels.com/ckfinder/userfiles/files/90554548304.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c699bee7bc4---87111865077.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/6dd9ed2ee1551c75bbdf8f7a238fce84/jeritogopasolefusapar.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/ee4fdf6cfaaa3efc5702a45bab426476/dexujome.pdfIn PDF document text
    • https://pakianco.ir/data/image/uploads/news/files/vawubexadewe.pdfIn PDF document text
    • http://burchiellati.com/file_fck/file/fodokaduvo.pdfIn PDF document text
    • https://elbag.net/wp-content/plugins/super-forms/uploads/php/files/1af659b14b000605421b7a00d7e0935e/8532265050.pdfIn PDF document text
    • https://markeishahall.com/wp-content/plugins/super-forms/uploads/php/files/7dc9c9749da46b715b2e353c93deb360/32751104270.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/13c45483aaf0d0ca756fff739896e5ca/vofaxolonugoxovak.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3f086fed7---25017251570.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/33900073696.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/dle4q85201guarvsm4ibi2pbd5/53904182024.pdfIn PDF document text
    • http://foodsafebox.com/ckfinder/userfiles/files/47700765878.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/011b7f8dea68f777a1b99f5fdc8a4ce3/85488866831.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/330hngg2p8jcqkhvkcbi9cs8h6/fapumimabomonuwodubuda.pdfIn PDF document text
    • https://www.autopsrus.com/ckfinder/userfiles/files/96977002202.pdfIn PDF document text
    • http://e1pl2.nazwa.pl/busy/fotki/file/55701567620.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_off0000d796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD796 11460 bytes
SHA-256: 483d38ce3f8be9ee98052063587b9ee2c2f09d6d363274d42053c6e5a9a349d1
font_01_sfnt_off0000f2ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010acc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACC 18200 bytes
SHA-256: 998cc02a5dacb3580fca816a41beaa4a059760208945111f28fabdf55c5446d6

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