Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0cb623a53a120cc…

MALICIOUS

PDF

86.2 KB Created: 2021-09-22 09:23:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fdc551b668958c2c34f6f43a9788a657 SHA-1: ee32bcc119a1eab3f6b6c8972d54dabffeb4e8aa SHA-256: d0cb623a53a120cca0e63f267770429c2f9e1965802aa97b31f8783a078452ac
196 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, with heuristics indicating it is an advance-fee scam lure. It contains numerous links to external PDF files hosted on various domains, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the presence of multiple links to potentially compromised or disposable domains supports the scam lure finding.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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 http://clean-ecology.com/Upload/files/godiwit.pdf
    • http://dorinhawear.com/admin/fckeditor/editor/filemanager/connectors/php/fckeditor/editor/filemanager/connectors/php/userfiles/file/fegugigaga.pdf
    • https://pacantioquia.org/aym_image/files/65137334866.pdf
    • https://avela.md/userfiles/file/tebewarusedipekuvamo.pdf
    • https://tattica.byespresso.com/app/webroot/files/upload/files/fevamitajudukudujoj.pdf
    • https://beautydent.hu/editor_up/jupunepurelorun.pdf
    • http://clinicaveterinariabilancino.it/userfiles/files/zerekogemareme.pdf
    • http://szyqjsj.com/UploadFile/file/20210917210539064.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/161386b6098451---353687327.pdf
    • http://rjbmachinery.com/d/files/41697910450.pdf
    • https://fundacionamigosdelmarcaribe.ong/ckfinder/userfiles/files/suvepelefuwase.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/d6aa23dd17b8c6c657a82d77e5edfd59/53627901115.pdf
    • http://3qbuy.com/CKEdit/upload/files/66027864429.pdf
    • http://hongdanhaudio.com/luutru/files/nefugaxugekado.pdf
    • http://phannhan.vn/files/usersfiles/files/vexikobitedimukisujalez.pdf
    • http://studiogalata.it/userfiles/files/32730687790.pdf
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/56891780816.pdf
    • http://sns-russia.ru/userfiles/file/29406389204.pdf
    • http://kramor.bg/userfiles/file/fudapukos.pdf
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/21424766274.pdf
    • https://biholka.cz/uploades/userfiles/file/sijisofakifimesoripatade.pdf
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/vmg7goe0ir5vc1k8jfcu02muf2/92251128351.pdf
    • http://larben.cz/media/images/upload/file/15421975854.pdf
    • https://seedcambodia.org/htdocs/cljr/data/files/83392894778.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=emergency+alerts+on+android+phone
    • 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_off0000eb9b.bin
1139ab50cb1e9c5599a2108ff0c69a9d1733ea4853993a40f0eca612e01089a2
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9B 17620 bytes
font_01_sfnt_off000119b6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x119B6 16792 bytes
font_02_sfnt_off000131cd.bin
5df2d7fe4fbfb58c517788be1a8f1183917935d96eeb04388416d0ebb49e48c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x131CD 11056 bytes