Malicious PDF — malware analysis report

Static analysis result for SHA-256 12dab227335b8059…

MALICIOUS

PDF

151.6 KB Created: 2021-06-29 03:51:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 18e21a0cabca701c6ad4414ed3c51961 SHA-1: 6c7347cea637ff0c1c99b07f31327ed4b5e3fb6a SHA-256: 12dab227335b80590d79197a0e61faa0ccf144f4909ee0e390f6e4abbc984ffe
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, and the document body was unreadable, but the heuristic findings are sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9756

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 https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd1518eba6---tegigaxoponinejoxu.pdf In PDF document text
    • http://budoprojekt.eu/obrazy/file/79217140681.pdfIn PDF document text
    • http://thietkewebbacninh.com/webroot/img/files/16047439892.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/91544522154.pdfIn PDF document text
    • https://santchavarabed.in/ckfinder/userfiles/files/93856596163.pdfIn PDF document text
    • https://mudraconsultancy.com/uploads/files/37406435377.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a60bfa48316---xanidololapikegufonumafi.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/27eade4e07dee4f1897a9d1265d0d738/32692125353.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/d76e247d0b0b6af36cb0c50151c55686/12077041589.pdfIn PDF document text
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/67566379066.pdfIn PDF document text
    • https://biothiennam.com/media/ftp/file/gewubetaxaruwer.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e4c54i90d4gkf5nquadjt48c21/magokaxizozixitonel.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/16090fec3d39cc---42530633098.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/866490f7744361f86a81fa06ed9833a7/ligutijemuxanugovuvaro.pdfIn PDF document text
    • http://truthtube.com/UserFiles/file/tusivowinorilifofizomuzi.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/1347cee5423abf18797f37bfec88f101/61254077837.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b0e83d3ad---32007965027.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/16092cf5d78140---nobinumonomadogusa.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d23f415b237---towelix.pdfIn PDF document text
    • https://rajakeempat.com/contents//files/49185962611.pdfIn PDF document text
    • http://be1971.com/clients/a/a1/a19be2fc4cf8b198b52f296748481ce5/File/96841652147.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160812138d662f---kanud.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/586ee7c7278b3f8d726b7f04b873628f/28978560135.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/memupabakomedofigojufe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=what+does+a+sped+meanPDF 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_off0001e6ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E6AE 1924 bytes
SHA-256: 6cc2fc06bc27aed7cb5e00284c49936f3138aa9ca081a7523215fbb158931a0f
font_01_sfnt_off0001ef9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EF9C 19504 bytes
SHA-256: c86e6712e85a6dc0d53663dbf00876242135a09e4494fb5064e8096b636b0507
font_02_sfnt_off000220ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x220AB 10412 bytes
SHA-256: b4095341dade0f5a408efac6e15896574442a54a0d432cf5570768bc8b6c7b0e
font_03_sfnt_off00023819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23819 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.