Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d2e3cc7dfb5187c…

MALICIOUS

PDF

78.8 KB Created: 2021-09-04 03:51:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: efc8b0e5121df884f7706944fb0f6b9c SHA-1: 1d2af8945973baac028b501de5ab279897dd8373 SHA-256: 9d2e3cc7dfb5187c12641d10edc4e99076cb733f7f1f8c259eed95f9dee27a4b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://dtmaso.com/public_html/Imagens/file/28824564187.pdf In PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16109d852c9ee0---89124810887.pdfIn PDF document text
    • http://lukasikgroup.pl/Image/files/12731337261.pdfIn PDF document text
    • http://101eyewear.com/luutru/files/99892959152.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16105e37fc1dde---figupelagob.pdfIn PDF document text
    • http://doctour.hu/uploads/ckfinder/userfiles/files/84270433736.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609637131b7f2---19493695550.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1611804779d158---81957093342.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098408388c44---81647603467.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/76544990760.pdfIn PDF document text
    • https://hohsingfiber.com/ufiles/files/72331094256.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16097bdbd8bbba---70448331350.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/cd639393975e26b07f230bbdd97093b5/gipopogezeresozuva.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609670ded65ff---puranebifagelutaweridube.pdfIn PDF document text
    • https://premium-house.uz/images/file/xudogew.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/fodugitipo.pdfIn PDF document text
    • http://fujiya-burbank.com/uploads/files/45446170196.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/o6afg7ag7ff5htl3g82gms23hf/19335636437.pdfIn PDF document text
    • http://xn--80aamwn.xn--p1ai/userfiles/file/dorelusixudu.pdfIn PDF document text
    • http://ctnphrae.com/ckfinder/userfiles/files/7123737606.pdfIn PDF document text
    • https://lawweb.info/mycms/admin/userfiles/file/95487448251.pdfIn PDF document text
    • http://hasici-pristroje-eshop.cz/files/file/bogegopugirafidibigafige.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/b8e52210abf528a26499c6f8978feda0/51037241127.pdfIn PDF document text
    • http://theshippyfamily.com/clients/57051/File/11246816059.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=convert+pdf+table+in+excelPDF 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_off0000cd0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD0C 10784 bytes
SHA-256: a77d6fb44ced8669164b2953e6392bc63370689b207c9e583ae6dc91c38a4dc8
font_01_sfnt_off0000e5d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D3 18484 bytes
SHA-256: 2a4ca20d4c80021b51961cfa19eb65cb108a1de1f37bbfa7ea898f4ea6bf5e2a
font_02_sfnt_off000115ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1