Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e9366c74f878632…

MALICIOUS

PDF

91.9 KB Created: 2021-07-04 21:11:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 88b342771030175a8d43e9f49f6dfccb SHA-1: 45ae06120d70ac14a7ce98268cb9a6217f692a62 SHA-256: 2e9366c74f8786326ce2224fe3041cf37e37140541672fbd507ea54a97a11dda
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous domains, many of which are hosted on compromised CMS uploads or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were directly extracted, the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://fedico.ca/upload/editor/file/pudotuzawebodaxofemawuvix.pdf
    • http://beveragesgs.com/userfiles/file/5614489207.pdf
    • http://lab4050.com/upload/editor/file/47210450612.pdf
    • http://bigpictureresources.com/userfilesbigpicture/file/suxasawimamelar.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/gtu2hr17r3bdlkmacm9g1gfqfi/liwun.pdf
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/3c9511a570829642571abe29ced0c267/pufebiwumoma.pdf
    • https://easybuildapp.com/files/uploaded/files/fofulususativiwe.pdf
    • http://aircond.md/upload_fck/file/kojekoputerewetupegeto.pdf
    • http://bjhtdszdh.com/v15/Upload/file/202162371481004.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dcac299b5c3---61446023757.pdf
    • https://congtydaihai.com/upload/files/rusadubita.pdf
    • http://omonetach.pl/foto/ilustracje/file/57779838960.pdf
    • https://aiwatopup.com/ckfinder/userfiles/files/23019691863.pdf
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/b13b9e9cab1de26cb3cc0461abb931ac/30701041018.pdf
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16075b76f63dab---minudenor.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5e7621084.pdf
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/a69b9d3c421f9fa10d899512bd69e708/1093323015.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16086ab5a64bf7---95052597585.pdf
    • https://apsco.ly/userfiles/files/bejoxivafajipuvakonekutu.pdf
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/n8ik5bfr348d0m2jdqnl2bopb2/lirivululumezijunufojixid.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2530438f9---83880317711.pdf
    • http://peak-experience-japan.com/vavezalesavu.pdf
    • http://pokewaveanaheim.com/uploads/files/karogiwa.pdf
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16092cc35364cd---5828096033.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=physical+chemistry+donald+mcquarrie+pdf+free+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010048.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10048 16792 bytes
font_01_sfnt_off0001185a.bin
2a894ca669cb8f745e5e290f564c304f9f34c6b6c65ebed9ae79acd8804ebac8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1185A 18256 bytes
font_02_sfnt_off000147b3.bin
28a58dd66dbc39b550c9bcf05932a36c98ee5b2737fd3cefed576c86e8ba8a7c
pdf-font-stream PDF embedded font (sfnt) at offset 0x147B3 11332 bytes