Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d202d9578b4dbe8…

MALICIOUS

PDF

75.4 KB Created: 2021-09-19 00:09:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5002df5f5c106d23b3b87d1583e27a0f SHA-1: 385adba25b52d645a1fe1ee977a4a755fd8929bc SHA-256: 1d202d9578b4dbe85a6261de2a9bd753ebe227cacde2e7cf5c2a9f20e5cbd586
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/uplcv?utm_term=truck+simulator+pro+europe+mod+download
    • http://ogcdc.org/uploads/ck_upload/files/butenejugugenojor.pdf
    • http://hoaisonland.vn/upload/files/zanaregifixerimos.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd2e523b53---27772052816.pdf
    • https://gabconstruction.com/ckfinder/userfiles/files/22390796288.pdf
    • http://studiotecnicodavico.eu/userfiles/files/93285130312.pdf
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614072429d8a6---kugawaguj.pdf
    • http://hitecds.com/userfiles/file/41941399641.pdf
    • https://nstoplana.rs/ckfinder/userfiles/files/78646855510.pdf
    • http://lsphc.com/userfiles/file///mufimofixozakikasisi.pdf
    • https://chataigne-cevennes.fr/imgs/files/nusudodo.pdf
    • http://ambartakip.net/belgeler/file/gifimajeloxafu.pdf
    • http://rotarylaspalmas.org/documentos/file/17220486672.pdf
    • http://netflor.pl/upload/File/xelamuwafovon.pdf
    • http://saikunghouse.hk/userfiles/zapixunuxudupogikelo.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16141f5233eaf2---52396475151.pdf
    • https://frisch.ro/files/file/93259206333.pdf
    • http://kubablimel.pl/Image/files/50107996894.pdf
    • http://ls12368.com/userfiles/file/fujobagufeka.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1613fbcd551a6a---66409211004.pdf
    • https://varida-tech.com/ckfinder/userfiles/files/46411992304.pdf
    • http://lamekatus.com/uploads/ckeditor/files/46043356672.pdf
    • https://myreply.mobi/snappshott/editor//file/zufofesetimegatotukarar.pdf
    • http://jiji.pgo.tw/pic/uploads/files/befulabolevewopomesume.pdf
    • http://mhinflatable.com/upload/file/ligutudanujatobexurifu.pdf
    • https://www.gico.ge/ckfinder/userfiles/files/79575588539.pdf
    • http://xn----itbbfrdrdbd4bgy6gi.xn--p1ai/webroot/files/files/93533719152.pdf
    • 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_off0000c27a.bin
b13b7415ca036b1ab4acf7899e7ee6b9ec0ce7fefe6bd6a061e67fda2479b3f8
pdf-font-stream PDF embedded font (sfnt) at offset 0xC27A 17192 bytes
font_01_sfnt_off0000ee7b.bin
f154800c6768dab9ab626737383c58fe6803c58695b764d404b9caaa8632a2a9
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7B 10916 bytes
font_02_sfnt_off000107d9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x107D9 16792 bytes