Malicious PDF — malware analysis report

Static analysis result for SHA-256 2618fe5878441d0f…

MALICIOUS

PDF

71.0 KB Created: 2021-09-17 06:16:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f47ea4f1a964e67af39f03a48aa4f5b4 SHA-1: 05ff4e11e7b0eba3bcce18dee2b511a31d58cd09 SHA-256: 2618fe5878441d0fc9c247ee2d9bea887a744cffc8a82788bcf99c3b7586046c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable domains. The presence of numerous embedded URLs, many pointing to potentially malicious content, supports the conclusion that this document is designed to redirect users to harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 http://domusanna.it/userfiles/files/nolelubo.pdf In PDF document text
    • https://spvi.cn/filespath/files/20210908202958.pdfIn PDF document text
    • https://farmaciasacoor.com/site/upload/file/94370672222.pdfIn PDF document text
    • http://about-dogs.ru/upload/file/faratekonixad.pdfIn PDF document text
    • https://yarpaket.ru/userfiles/file/lelenuwunudufuminovulokog.pdfIn PDF document text
    • https://volnynaklad.cz/data/file/judunulujidojaxifowizesiz.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/19pffmso495ni09dplmsetucj5/mogadidorasafudizoganex.pdfIn PDF document text
    • https://pisangmanis.com/contents/files/15277432211.pdfIn PDF document text
    • http://keyflounge.nl/userfiles/file/mofabiforor.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/663f084f07f80970ddb96e73ac7f52a0/63307383696.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/bujalomanamu.pdfIn PDF document text
    • http://bassbasement.org/userfiles/file/52007652096.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/96271431881.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/genajilufononuvuda.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/95606623801.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613729ea26be6---30731253803.pdfIn PDF document text
    • http://bubb.cn/up_file/file/97071878356.pdfIn PDF document text
    • https://huaku3c.tw/uploads/files/202109041559244696.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613b089f92805---jimumivepamujuvifupedax.pdfIn PDF document text
    • https://faktxeber.ru/resimler/files/ladonutosudusasexujub.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613c92efb5419---82818262211.pdfIn PDF document text
    • https://atasuorganiktarim.com/upload/ckfinder/files/bimalejelewufunep.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1614064ee0d548---24913194348.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=wifi+not+in+range+androidPDF 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_off0000b82a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB82A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d03c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD03C 15384 bytes
SHA-256: 13096a539c70ff596e198ea0ca481bfee318d4be13ebdc0ab64f0dfb8ffeded4
font_02_sfnt_off0000f757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF757 10308 bytes
SHA-256: 8bea34f26ca184ba54ccdbb831609f77d331499255890adb2d3f4b835f5d429e

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