Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d940890fdfc8f00…

MALICIOUS

PDF

68.3 KB Created: 2021-10-01 06:57:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 10c7e3405d913308058b93a53f1697a5 SHA-1: b9c34e2326b59acbaf0852582ba0a5beb6686bd9 SHA-256: 8d940890fdfc8f004d96dd5894543afd16a691ca0e4566e6cf1bd0ef0ae9587c
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that point to a variety of domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate structure for link farming. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://drafthe.ru/uplcv?utm_term=django+for+android PDF link annotation
    • http://bnblspecialities.com/userfiles/files/30010458894.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/16151f6fc36094---77519138403.pdfIn PDF document text
    • https://billard-hauri.ch/userfiles/file/sedawakutukobo.pdfIn PDF document text
    • http://ebd.su/UFD/7623/files/boteduro.pdfIn PDF document text
    • http://unicaconsultoriarh.com/images/files/xajapufizabejewolefet.pdfIn PDF document text
    • https://zd-zeta.com/uploads/files/202109120316059309.pdfIn PDF document text
    • http://ccsctda.com/ckfinder/userfiles/files/20210911_213820.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/qtn84a1vrt58n0cvfc3ehe23s3/22826456592.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/fovejupumumu.pdfIn PDF document text
    • http://redeyeldn.com/userfiles/file/kololuribazo.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614517a09b068---vabanilogititixamogim.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16154062139ff7---guzelavepabe.pdfIn PDF document text
    • http://clubblink.net/admin/upload/file/86480486566.pdfIn PDF document text
    • https://iohrp.org/f_files/files/50253900887.pdfIn PDF document text
    • http://dachastyle.com/userfiles/file/9345848126.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16155becdefc6c---dovuxegejifinubakejitugel.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/kodotolit.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/jusugilekunatekamebi.pdfIn PDF document text
    • http://abwgulfport.com/uploads/files/51333123817.pdfIn PDF document text
    • https://ooo-kenk.ru/userfiles/file/zarazun.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161564949b2a36---8678956906.pdfIn PDF document text
    • http://ehoron21.mn/uploads/files/bavufejetajuligejipowatir.pdfIn PDF document text
    • http://acmemask.com/upfiles/editor/files/gunowu.pdfIn PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/fenipemubusixemimoda.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_off0000af9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c7b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B4 10216 bytes
SHA-256: b3b87f3c1a0606b0e3e22cb06fe5d9497f527de09f88164e530747c2de7e475c
font_02_sfnt_off0000de65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE65 14948 bytes
SHA-256: 33bfc05bd6196009ccdb9f32791e5015f6c5dc100ba40e3aea3721351c1f7c18

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