Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ef69dc2a7e6fd66…

MALICIOUS

PDF

85.9 KB Created: 2021-09-03 05:32:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 39bdc142f9bde3538e4dab3fc9946738 SHA-1: b553aa0a6c6c5106a5a3fd2dd24280152a514857 SHA-256: 9ef69dc2a7e6fd662a9456dbb8796547b2be6c6515af1dc35525a656a4d6ff0d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains a link farm pointing to compromised CMS upload storage, suggesting an attempt to distribute further malicious content. The 'Password-protected archive handoff' heuristic indicates the document likely instructs the user to open a password-protected file, a common tactic to bypass gateway scanning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://doosradashak.in/ci/userfiles/files/vulojalozejipit.pdf In PDF document text
    • http://splhardware.com/UploadFile/file/2021073012031673499.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ab3a93d54a2---wiladizasu.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e401b9eddca---dimeposevepalaxifiva.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/4819762133a0735500233bd587afe7d8/mikazazuxav.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1610317fc23f1d---damagebapukuzij.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021070406464246.pdfIn PDF document text
    • http://netisiletisim.com/guvennet/resimlerfiles/ritagefadupa.pdfIn PDF document text
    • https://www.ccs-corporation.com/ckfinder/userfiles/files/39595486571.pdfIn PDF document text
    • http://aristosaigonhotel.com/uploads/files/xazamefanozesoj.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/91e59bb174ca2c74cbc7128825ffdd0c/23041671954.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/lirowonisor.pdfIn PDF document text
    • http://jun-travel.com/userfiles/file/biraratozetomegawedusu.pdfIn PDF document text
    • http://piecco.eu/upload/files/10840613129.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c733550dddb---93053734974.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d3e7fd955a3---29529836.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/ljq6c32hj94bki9gu6k1vu8r30/90018005636.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/34013848635.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/k95c3g1ri17d5g9t9ehb0uden4/52929821748.pdfIn PDF document text
    • http://nfrostov.ru/upload/files/32907620044.pdfIn PDF document text
    • https://vieclamlaocai.vn/webroot/img/files/86804021147.pdfIn PDF document text
    • https://upaspor.com/resimler/files/35841248117.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=peavey+sp2x+manualPDF 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_off0000d5de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000edf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF5 10504 bytes
SHA-256: fcb7b436341f17f2c8ac943b779bbaa9383fc9ac8dfe97d94b94646fa5acab9c
font_02_sfnt_off000105f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F2 16920 bytes
SHA-256: b3c462f70becf758b74790427ce88f98d309c5d3d9f6c04c47214bd3253e6206
font_03_sfnt_off00011e74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E74 16680 bytes
SHA-256: 6c014309b73e57143ceb5e3f974a2fdfe079e503ff8258824c3568e54fdb7c65

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