Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a3ed7a9e3cac87b…

MALICIOUS

PDF

82.5 KB Created: 2021-09-07 17:27:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d6399febb3d887c038e950f65571bfd9 SHA-1: f1bb475eede7a8b06aa909c3cf5c0966bcdd68d1 SHA-256: 9a3ed7a9e3cac87b0f4e64b128dacdf65e167f16902b66526bd153ae3afccfd2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised websites, some hosted on disposable domains. The PDF structure and embedded URLs suggest it's part of a phishing campaign or a distribution vector for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://talaa-obour.com/webmisr/uploadwebmisr/file/ziguxanofomafojabupilizu.pdf In PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/l8nak615jrlaupl5n2tnbti0um/kawakugixagimomalofofe.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/stq3nil9vuq2c7l5ooijosovmi/80628844462.pdfIn PDF document text
    • http://turnyras.lt/Files/file/padifevevezazenevi.pdfIn PDF document text
    • http://debsecond.net/UserFiles/File/37730824276.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16094aea55f9b4---23091056114.pdfIn PDF document text
    • https://anaksemut.com/contents//files/67042038807.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a0508f54d---zosogiwazi.pdfIn PDF document text
    • http://codienlanhminhquang.com/upload/files/67209158168.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1620588286.pdfIn PDF document text
    • http://trungnguyenjsc.vn/uploads/image/files/ruvejuzokofapedovumozof.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609bcb13e10f5---10725113606.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/70561290936.pdfIn PDF document text
    • http://topstec.com/d/files/wuvasamigokajuxisojesuwe.pdfIn PDF document text
    • http://ferrogep99.hu/static/media/file/tolewulelixevuvuliru.pdfIn PDF document text
    • http://abwrosedale.com/uploads/files/89157666210.pdfIn PDF document text
    • https://tantecoccole016.it/file/pabeligig.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/gososesave.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/12528624111.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/104919427960a2c7d1e7f07.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/nawasaxaj.pdfIn PDF document text
    • http://mariancozma.com/_user/file/zitaduxirika.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/43a967fee5ed5cb5fa24bce7bb1966ef/terijibewuxo.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/96d80d3fc533da610829fe7935a68156/pabevupadesojagujabafib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=hand+lettering+worksheetsPDF 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_off0000dc32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC32 10696 bytes
SHA-256: b0acb944fb29afe522942af6d99d333c3de42690927e8cf3e3a982fd8ceabd96
font_01_sfnt_off0000f46b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46B 18412 bytes
SHA-256: e4e0d1a5cecf21ca1a8875346316974ecdc05dcf9f4db1defc25986a928778da
font_02_sfnt_off000123f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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