Malicious PDF — malware analysis report

Static analysis result for SHA-256 34e5d5348f78b273…

MALICIOUS

PDF

92.1 KB Created: 2021-07-30 11:01:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5403308faeee24db866ddab9a76664ba SHA-1: 85318ccc26165637c2fd1fa067a28ea55f07b2f0 SHA-256: 34e5d5348f78b273d4a17087adb09b6148996f6d9bfd64f0e55bbb276a56791a
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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 http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c608c320ba---xirire.pdf In PDF document text
    • http://sheeld.org/clients/d/d0/d021426cee8527c21a172be12ef3d645/File/medofilela.pdfIn PDF document text
    • https://termofriz.rs//files/bidesafekusox.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d7dfe66c07---vomalilidizabisolisi.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608724403e756---6712367889.pdfIn PDF document text
    • http://sluchatka-shop.cz/files/upload/files/61722259382.pdfIn PDF document text
    • https://hfbee.tw/upload/ckfinder_temp/files/20210703233719.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/ae49e69ca5090a62cecee976d6c9fa7c/kosari.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/84533482989.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/79926584315.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/95506982360d5ba117d82f.pdfIn PDF document text
    • http://vertracapital.com/uploads/files/69434436146.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/e449u2itot93vrdm9tid68ulc4/fetezifoma.pdfIn PDF document text
    • https://chungcungoaigiao.net/uploads/files/tifawusaziviludoxi.pdfIn PDF document text
    • http://drjoecarver.com/clients/49355/File/877329389.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/2ojceo38vflrf1290e5o60ecco/51662284077.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160a90cab6adae---nubekofisubiduletodawux.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/jpcva25thssrp6e1fe9neaqc88/mogotexopewaxiwil.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/rvf80mmn1i3gno0edmp2h838b1/wirifega.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/1a4ad35bd3d9c696b3f394f75884d24d/dobid.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/62495009857.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/f4336b5b2cc326b7bd0213be26a94cc5/zaxikenaresaxorezosa.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/4889cc79e99bf21dcd26732248e0a646/94258259913.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/67be7cbbba2dde8b553ef417b7d9d8e3/19962858249.pdfIn PDF document text
    • http://stavclearing.ru/upload/files/20757405606.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071947f610c0---negepalirewej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=area+of+triangles+worksheets+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5E 10936 bytes
SHA-256: b8b71fe942f621b5a229b581bd90739525f2618e7bc58ec352c987becc57a518
font_01_sfnt_off0001077e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1077E 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_02_sfnt_off00011cc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000134d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134D5 17200 bytes
SHA-256: d3a390b13e4db755cf8974a9d7a4499681283be20140a652b848c8dc94728f43