Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f55ddcd4e4b422a…

MALICIOUS

PDF

98.4 KB Created: 2021-07-15 19:06:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 60356248362ab1671a0a74096206d20c SHA-1: 2d80a36fbdab35cb0e2eb3fc76643c16253af136 SHA-256: 5f55ddcd4e4b422ac943b3ec8d1965c54b64a3d0b5df534983b6194bc42aedf0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable hosting domains, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or further stages of an attack. No scripts were extracted, but the structure and URL patterns are indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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://organicfertilizerproduction.com/d/files/resilagalozigowoti.pdf In PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cd6d4871e6d---zonotubigenaxazesomofot.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/u3v43amqgdf2grrah41d1vrttr/80813493157.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/stjaqpfk141sk94nanrv5ojp50/54405152816.pdfIn PDF document text
    • http://archimax.ch/dynamic-images/cms/file/movexabezokabarugesimuboz.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/4b2057fbfa31c3a83078e37237cfbca3/sujixisavuvokapusor.pdfIn PDF document text
    • http://hosungtour.com/FileData/ckfinder/files/20210605_751B19F04B27D150.pdfIn PDF document text
    • http://feast.to/upd_file/wuteponivusesoxonuzifizi.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160abb30416734---88808525388.pdfIn PDF document text
    • http://andreaslasnik.com/data/files/vakagokupewimobisajade.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/asc609jsn7h1tn3uhhjt65esmu/pugibefagi.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1609374fba104d---61073223593.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/94050717591.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea325a264c---kiwenasilale.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/9dbe77fe80f01520c23922a43c9e8e00/wijalopiridobokazinup.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/e14e2703e1564b7ee7712cb5771eb70d/zebajatapegogonovafilubuz.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/mafoxegikelufexibob.pdfIn PDF document text
    • https://airshow-bg.com/file/kutelufemusu.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9cc495a631---sukikeri.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/0abae0df1b2c7a97062c614615756413/73355915036.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aadb9515364---34639929777.pdfIn PDF document text
    • http://zjhywt.com/images/upload/File/zefefesinasugenoninexog.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16093f436b7081---47436535807.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/5ce868d0f9d7d7e3f956dc238c3900ea/fimepifabez.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/1cc7d2f542806ec10133f95f69a62698/jeboratawimemenadil.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/n65q7vn0jvg3jiljmedj959dd7/24548778763.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=history+of+watercolorPDF link annotation
    • 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_off00011a0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001321e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1321E 19764 bytes
SHA-256: ffe45fb6d43ea89400aaf2a043bfe5b8321deef666cca2e07290d2a4490c68b0
font_02_sfnt_off000164a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164A3 10416 bytes
SHA-256: c63e338d027a063e631192e02992ebd9dc8bd397e30c146ffd4f8af83dc9793c

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