Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c46b41239064662…

MALICIOUS

PDF

81.2 KB Created: 2021-09-01 15:34:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 159049f2ea19d9d6548924d8b41da1f4 SHA-1: b4aa4e069042cc64331e3636a10029336ee35b25 SHA-256: 8c46b412390646626276df96a8f3a1087871366cb5f3d093cb3a643ae877ae4c
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the PDF functions as a link farm, directing users to multiple compromised websites and potentially disposable hosting. The embedded URLs and the nature of the heuristics strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610d692386b17---47489456601.pdf In PDF document text
    • http://koryosushi.com/uploads/files/sojenuj.pdfIn PDF document text
    • http://learningkey.org/userfiles/befitijeme.pdfIn PDF document text
    • https://langumeistras.lt/i/File/12361359850.pdfIn PDF document text
    • http://etkenkalip.com/CodeignterProject/vizyon/files/50690758000.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071d2abb9bfd---xunesu.pdfIn PDF document text
    • http://hanasushichoice.com/uploads/files/doluzajiselaxopazubino.pdfIn PDF document text
    • http://eurekaelearning.com/upload/news/file/50233800604.pdfIn PDF document text
    • http://rhondachem.com/d/files/potupevaboxapetutedir.pdfIn PDF document text
    • https://equinox-e.com/upload/files/jitexojipotunipaxo.pdfIn PDF document text
    • https://jmcoverseaspvtltd.com/uploads/files/zeropezozulozorit.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/98545477304.pdfIn PDF document text
    • https://arerp.kr/data/file///67153192176.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/91370311624.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608471daa373f---40751635638.pdfIn PDF document text
    • https://smobiil.eu/userfiles/files/98564046726.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/geo15gda793itfri4i58tfsm8b/foxozivo.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/s112a7hags4rk2uhivei6rrhr1/361693737.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/ef5b1cbb718b9c379e3c267ee5dc6a3f/25559715337.pdfIn PDF document text
    • http://safarekhoob.ir/basefile/safarekhoobir/files/31691131976.pdfIn PDF document text
    • http://bigpictureresources.com/userfilesbigpicture/file/80545925984.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/65d7df24ef5a1e2b2b590aa89c52ab57/14278325398.pdfIn PDF document text
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/3b30r0t5q32mnqqbpk0oekbjef/26494210020.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=types+of+speech+deliveryPDF 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_off0000d852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD852 18000 bytes
SHA-256: 57754c99953046ebbc91d750aa743b4a8bc47d4d313043ead7a6ab71b27f304f
font_01_sfnt_off00010645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10645 10496 bytes
SHA-256: e381eb82d5bcfa611a3c60866770348f7513f8dca0b2fed45ced95b4fa182c22
font_02_sfnt_off00011e47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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