Malicious PDF — malware analysis report

Static analysis result for SHA-256 5145d1eb849a7bb7…

MALICIOUS

PDF

86.6 KB Created: 2021-08-11 13:06:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7297dc8c84d7d12d737956a99da239cf SHA-1: 7e6d0ea4a3e039ead5eba6a9fab7ad4610639444 SHA-256: 5145d1eb849a7bb7d75f37679945234f2a4a7a23c7f185be9cbc4c08dfff91e9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm directing to multiple URLs, some hosted on compromised WordPress sites and others on disposable domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8054

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://elm3rad.com/file/80555549704.pdf In PDF document text
    • http://barsugo.com/ckfinder/userfiles/files/1823309391.pdfIn PDF document text
    • http://orsini-blasioli.it/userfiles/files/mosidusug.pdfIn PDF document text
    • https://robertbah.si/files/file/sujagowevoboruwubunuxoxij.pdfIn PDF document text
    • https://aashianarealty.com/file/13145656236.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/36cbecddb284ea9f53183da28ec5a0b2/12165440842.pdfIn PDF document text
    • http://rjt1.org/upload/files/najiwobegumefowovis.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad196e9178---jadilikukar.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608612fee15fb---83769001584.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/18525324738.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/27011889210.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/lapatfsea7uu5s4mev13qiml9u/zofadajadatoxoso.pdfIn PDF document text
    • http://xn--80aantfcaehjbxzf1m.xn--p1ai/userfiles/file/rilimibilemurimulukajaf.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c1aeabd0f19de090ff346c0ab5564058/9612333973.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8f3689cd4---fowuwuzotumusob.pdfIn PDF document text
    • http://baggiez.net/userfiles/file/83804116647.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/duvozedife.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/78d36cf407affa74ec7660be5b4e2e14/47701684391.pdfIn PDF document text
    • http://lifeisartfoundation.org/sites/default/files/images/userfiles/file/98496521449.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/0nov2tfdqprq1d3548tiir2ij1/81286308045.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/45170848916.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/e1c0f41538e77b7a476914cdd8427b8e/kowepapajizikofudituz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=ayt+edebiyat+islamiyet+%C3%B6ncesi+t%C3%BCrk+edebiyat%C4%B1+%C3%A7%C4%B1km%C4%B1%C5%9F+sorularPDF link annotation
    • 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_off0000f14c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14C 19416 bytes
SHA-256: 1e5d065816d3cf715ddd1d8687fab4dc24b25399f621576b01c295aca5f8d8d4
font_01_sfnt_off0001206b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1206B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13882 11852 bytes
SHA-256: 8d2adb8014fb1479624434598fc635d1df338bd9ff48caceb5d135cb2b883a8f