Malicious PDF — malware analysis report

Static analysis result for SHA-256 047457cf791f50d1…

MALICIOUS

PDF

96.2 KB Created: 2021-07-16 22:34:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: e5c6bf60d9689acde75fd39fa34aad82 SHA-1: 8ab029600a97679e807dd0378c36e913f856fcb3 SHA-256: 047457cf791f50d14be722f9dfafb256a3616c25b69f6acb6adf794d95db848b
156 Risk Score

Malware Insights

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

The PDF file contains a large number of links pointing to various websites, many of which are hosted on compromised CMS platforms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is unreadable, but the heuristic firings and numerous URLs suggest a link farm designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/hr8gjupn5nj4ficm8be14g1ah2/77966007039.pdf In PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/fe8b0ba4680259a7220b77dd42a8a611/66173518393.pdfIn PDF document text
    • http://telmeed.com/web/ckfinder/userfiles/files/39258251922.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/eb865a5cd966b98048c4821a52ce9a81/31379563901.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-4-29/20210429154338815974.pdfIn PDF document text
    • https://cnc-ar.ro/files/file/mijosuwo.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099ed0891988---bunosoka.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16091463c6c1af---90931746664.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/hu97l5elo6nvg8m1v13lo4gb5u/zanasazopuximozifut.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/jazafukuju.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/7c5c907c4f34364464b0c31afba38410/26884767767.pdfIn PDF document text
    • https://farmaciasacoor.com/site/upload/file/86635776940.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/23k5gah2k16t4dmr05u3f8a8b4/rudokeloruxegunaxo.pdfIn PDF document text
    • http://mashtalkandil.com/userfiles/file/xizibugona.pdfIn PDF document text
    • http://uniquehotelsolutions.com/files/others/mizokuga.pdfIn PDF document text
    • http://debnine.net/UserFiles/File/32620707701.pdfIn PDF document text
    • http://codemessaging.net/ckfinder/userfiles/files/sorexowodotofin.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/50352979050.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c391d924f3---21341328435.pdfIn PDF document text
    • http://cuhs1981.com/clients/8/82/82ca37c076ec4232796cb58ed009bb3a/File/befuba.pdfIn PDF document text
    • http://firegallery.ru/img/upload/tevelalox.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/jupubatimininolu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=what+does+shalom+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_off0000f62e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E40 19100 bytes
SHA-256: 23f7664bf0849bb3fc0b98fbbe665f96f59b0557fac8f629f643950a77084f98
font_02_sfnt_off00013e8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E8B 10312 bytes
SHA-256: 3918e4b19a84eabc54aaa22297c2aa3c6873a337576fe697f7581e0d32d18976
font_03_sfnt_off0001559f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1559F 18436 bytes
SHA-256: 5e3f6b23f7cb3744bc8751e59d90599dfd36945b22497a27ffab5daefeb0b405

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