Malicious PDF — malware analysis report

Static analysis result for SHA-256 7400e3889dcdda05…

MALICIOUS

PDF

82.0 KB Created: 2021-08-23 10:02:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: eb68beab0dbc33b1dd0ca6eeed3b995c SHA-1: 92cbdd4b00923988a4ada28484b558b8fe29ed46 SHA-256: 7400e3889dcdda052b32efbfd0351efe9482ddb33c4c2ea130fff20cd81741a7
164 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, presenting numerous URLs, many hosted on compromised WordPress sites or disposable domains, likely to trick users into downloading further malware or engaging in phishing. The presence of 'utm_term' parameters in some URLs suggests a phishing or spam campaign context.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://philabc.ru/uplcv?utm_term=clindamycin+hcl+300+mg+for+sinus+infection PDF link annotation
    • http://argol-editions.fr/userfiles/file/49227484389.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/8506618109.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae9ae14d5c---guzowipeniwal.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b63e504fd7---lonoziresopodetopuwef.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160804fdf1cd67---damosenuvofan.pdfIn PDF document text
    • https://tectrongim.com/uploads/files/pisanekiditizem.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160bb71494d16b---41869087223.pdfIn PDF document text
    • http://csc0512.com/userfiles/file/20210616031022_7dhjg3.pdfIn PDF document text
    • http://robertoantoniz.com/resources/original/file/xavesadafodedefe.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/94900da9764e0c9f1c23f407a69a7fa6/mebinowedabidi.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/61d84da6bf749e189fe6b5e69497c002/51314067843.pdfIn PDF document text
    • http://peaceinsrilanka.lk/ckfinder/userfiles/files/93996073423.pdfIn PDF document text
    • http://dawahcity.com/userfiles/file/53756169556.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/049f4d2149699bac1e3bd45ceef32627/42421000023.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e835b89e8---71040165393.pdfIn PDF document text
    • http://geometrabottero.it/userfiles/files/47274394898.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/b7abd9c216a544fab31985fd7be775f3/12120326398.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/37881044312.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160851ad5aedb9---mobagibozamek.pdfIn PDF document text
    • http://manhchenang.vn/webroot/img/files/vemuw.pdfIn PDF document text
    • https://rajakedua.com/contents//files/36815603772.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/bd5f98fce9ff7961752f0ac9653e7da0/lurivirovaxodate.pdfIn PDF document text
    • http://industrialdevices.in/uploads/baxozujikuzawu.pdfIn PDF document text
    • http://challendor.com/fckeditor/upload/file/57155233153.pdfIn PDF document text
    • http://vinhthuan.asia/upload/files/werivuxo.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF609 11464 bytes
SHA-256: 8afaea57f212d6be9f1f33c2b069bbc7f3f48a776c71b1c33234b0d74a49361b
font_02_sfnt_off000110ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110CA 16144 bytes
SHA-256: 7b5055b0c343776531c010f57d7504be12887695378512aeaf8e3ddfde4065af

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