Malicious PDF — malware analysis report

Static analysis result for SHA-256 93070ec5faff8472…

MALICIOUS

PDF

87.4 KB Created: 2021-06-27 07:28:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 849e6aaa3408418b8e22510012908819 SHA-1: 229f31f2ae577fccf33c8762add78ae703e75f03 SHA-256: 93070ec5faff8472c624d66eaf065bb018e34dd6de4e770608699aad2a4bb47c
176 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary attack pattern involves a link farm designed to lead users to potentially malicious downloads or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/d28a6pctsmv42qcq643mq43gno/99461109555.pdf
    • http://ghhs1968.com/clients/5/57/5762190d0a265df614d1f295a7060a42/File/funetesaropabovebegowu.pdf
    • http://wsp.pl/userfiles/file/tedivabusigasubolalivij.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081af7c159e7---tazulabemilosadifukulerav.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4379b5b9e---92030536224.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16089a9fa386be---31102345829.pdf
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/ss5hei8fg8jt8hipou8dtfkbg6/lixepebisipurifivewateno.pdf
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/6311cec26ceccb4a68ce575a08b460b2/52132646071.pdf
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/98222843068.pdf
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/b59383a4014322b4c4ee0f77df9476af/luneti.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdf843bd84---sozad.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b25055ecff5---86001865917.pdf
    • https://bcbc3399.com/upload/files/79206321624.pdf
    • http://gayaarchi.com/userfiles/file/20210522154403.pdf
    • https://makiriaszto.hu/ckfinder/userfiles/files/latexojilinef.pdf
    • http://banghetretruc.com/media/ftp/file/31390619408.pdf
    • http://cnex.cc/images/blog//file/revonefupametubatenufur.pdf
    • https://www.propertyadvisersaustralia.com/wp-content/plugins/super-forms/uploads/php/files/3bfb0b842c0f55454eff5c4117013faa/vevubeb.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160d78c200ecd1---57642424812.pdf
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c1ebcea1f---70394389116.pdf
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/160763839057d3---89984201983.pdf
    • http://bjhtdszdh.com/v15/Upload/file/2021517057194235.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/n292em43qtkn1fs00tmca7isli/28358555131.pdf
    • http://karunb.com/UpLoads/files/zegatozokelezumul.pdf
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/78d55b464715a64bed832a9508a41967/vizokuxof.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=worksheet+on+life+processes+class+10
    • 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_off0000ef5a.bin
59c7fb97a788f937cd8809dd9e84ed59beeadcb6d9bc6b0ae93063ba657b9ac6
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5A 10836 bytes
font_01_sfnt_off0001085e.bin
7977103c500846996e3b7af072569bbace0fa48613f4c1912fcf9b0e348992b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x1085E 18332 bytes
font_02_sfnt_off00013840.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13840 16792 bytes