Malicious PDF — malware analysis report

Static analysis result for SHA-256 009b38b3e93adc7c…

MALICIOUS

PDF

92.2 KB Created: 2021-08-14 10:10:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6a535ced8c483d5faac64c5b3b566a27 SHA-1: 3811a5cdd7823760ee7d9cb949600915fe8d69b0 SHA-256: 009b38b3e93adc7c96398e6b421e939ccc30916df307691b5d22ae1e137d877c
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. Heuristics identified it as a link farm hosted on compromised CMS upload directories, pointing to numerous suspicious URLs. The document body is unreadable, but the presence of multiple external links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/269eec4c3351c71dd153e44de6884a3e/50335636825.pdf
    • http://csa.china-led.net/static/editor/ckeditor/ckfinder/upfile/files/6013257790.pdf
    • http://rioairporttransfer.com/ckfinder/userfiles/files/49913995339.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8de6046a3---56093119692.pdf
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b5fc259f2---pizijuvazotu.pdf
    • http://medeeatour.ro/mm/file/tuvivi.pdf
    • http://thegioituigiay.net/uploads/files/49403205737.pdf
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/d26950fae2f4aeb99e79498332f1d9c4/baforidosopiwewovisiratoz.pdf
    • https://hbfilm.ca/resimler/files/12129760850.pdf
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/ce7d7b188e1a013da8b96a5fc5081ad7/gusevi.pdf
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/1466a27195fa99f38e6810bd9f16fa8e/53309505870.pdf
    • https://arendic.cl/files/86102532562.pdf
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160a9dc307b189---80041674982.pdf
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/a604852f2e7ca3d6bf70649423989d07/bipudogatonoxoxonesa.pdf
    • http://osmed.cz/app/webroot/files/files/80451669494.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160b1321c510ba---wagabesuretipemi.pdf
    • http://brezov-gaj.si/uporabnik/file/zowamagimokiparinuxubulok.pdf
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/41701774702.pdf
    • https://istanbularicilikfestivali.com/upload/ckfinder/files/kufakub.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091947da9454---juketetamojegapi.pdf
    • http://kolkandkolkdesign.com/site/data/ws/files/23696690258.pdf
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/b66a2e8ac783d947c7f690ce8d1e402e/24447623811.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c6f7d8e60---girudinaju.pdf
    • http://www.buildingmalawi.com/images/uploaded/documents/jogetamipegawugadin.pdf
    • http://msnladyboy.com/ckfinder/userfiles/files/93989863447.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=lab+report+gravimetric+analysis
    • 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_off00010262.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10262 16792 bytes
font_01_sfnt_off00011a79.bin
ce978e476d5e2d6e95ceade7a7fa85dea311126c8dd0164024c9c74cd2ae8a78
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A79 10992 bytes
font_02_sfnt_off000133d0.bin
960fecddd9e55df5604adef321d428a70a0a60e1f421dcf0cbc8cc6f7d2cca4d
pdf-font-stream PDF embedded font (sfnt) at offset 0x133D0 17820 bytes