Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aa7e3ead2b60fe5…

MALICIOUS

PDF

84.4 KB Created: 2021-09-02 08:55:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 69fd1355c10e4e58d1aa587491dea7c5 SHA-1: 5695888d313bb482fc6f5f462a3a21219e465e8c SHA-256: 6aa7e3ead2b60fe5199e6b2a6055a7063b130b8865ae4074679733d669fc3c19
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised WordPress sites. The embedded URLs suggest an attempt to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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 http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160b3b43e41157---96057022001.pdf In PDF document text
    • http://placc.info/up_image/sorobe.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca5be0cbca---fafizijajitonuriwese.pdfIn PDF document text
    • https://bursakaynak.net/userfiles/file/2892450018.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/64150175230.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/ae3b0c69202d3acbb78a3ded804f82d3/pizusimupixidegepowa.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/qe3e0u2n2l572bk0em5m643p13/96184596979.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/pongi011j4s89jasgfpghfq1if/garatod.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/f00b88810b5c88f2dd3db795cfd94e78/48222957196.pdfIn PDF document text
    • https://farmaciasacoor.com/site/upload/file/75200409614.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/xajefesezaziwuwigakunodam.pdfIn PDF document text
    • https://glory-aqua.com/userfiles/file/89355990884.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/1mhh7i7oht744ld2q0dgl83401/xituk.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160924954396a1---toridajulameb.pdfIn PDF document text
    • http://bjaimama.com/data/upload/2021/08/file/202108052052555166.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a01bfa6c53a---musaxebunevudefugezenat.pdfIn PDF document text
    • https://jf-orvalho.pt/userfiles/file/vuwugiraninexudelomit.pdfIn PDF document text
    • https://www.visitrwanda.com/wp-content/plugins/super-forms/uploads/php/files/71b6bbcae4b9e8a42fc2d0bdf92f99ae/wazewabawedosasonojasoxa.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b3dd992f02a---74078471742.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/75951937934.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/wabadadelodij.pdfIn PDF document text
    • http://accu-chek-event.com/ckupload/files/vujewajemabozal.pdfIn PDF document text
    • https://innovativallatgyogyszer.hu/fileok/file/sedemuwokijun.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/qtaoptdjbqfjl1fbc0i1uips1c/zuzaketazabadopadidapot.pdfIn PDF document text
    • http://gwardiajuvenia.pl/zdjecia/fck/file/78017469468.pdfIn PDF document text
    • https://ldoris.com/upfile/files/20210807030636.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+say+pillow+in+spanishPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0E 18548 bytes
SHA-256: b67d97667bbf055417d157a706c87effd2ba3747eb3ba963148b955f55a47504
font_02_sfnt_off00012c7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C7D 10308 bytes
SHA-256: 2c2a8061c3144e59b2864d289e4c07ec7dca58eacd97ef6d78af7b8dcebecf63