Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2f354588c13f1de…

MALICIOUS

PDF

85.7 KB Created: 2021-07-13 22:18:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: fccc84a600970815101edd6244a4d3fc SHA-1: e90c5f28c627fe30b0c636645bd80c88f80502ee SHA-256: b2f354588c13f1de701c65d60c9eb2876546883d997812e720df16590a89b9c3
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites using the Formcraft plugin. These links are likely intended to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1bf3275eb5---6589611564.pdf In PDF document text
    • http://meadescafe.com/userfiles/file/6700381982.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b1572e448---nelobibekisimopi.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc9258ce1f---67978693481.pdfIn PDF document text
    • http://apcmagon.com/userfiles/tisevezumupas.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609bb599181f7---rikurugonir.pdfIn PDF document text
    • http://viajesalaos.com/webroot/img/files/pulofufizalokewikojewuwoj.pdfIn PDF document text
    • http://parkettes.org/clients/b/b3/b30d687fb0e6fb0c44210170e51784d9/File/numotedawulolopoxedol.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/47fe3c88ace0d0ce47c16131bc523c0b/41659000617.pdfIn PDF document text
    • http://nhahanghienminh68.com/upload/files/doxuwid.pdfIn PDF document text
    • https://dienlanhbachkhoa.info/upload/files/luwomepuxidibux.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/fd8d5d607bc5e98e7344ba3c0942fd3f/mapaxajuwefu.pdfIn PDF document text
    • http://abwvictory.com/uploads/files/27018105919.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/39htqb8dfu63ldoc1agu7nnu14/dodoserenalesamizebe.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6b8866c99---tubuponokasejuvoturufifo.pdfIn PDF document text
    • https://zippy-inc.com/app/webroot/userfiles/files/fatefovosavolo.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c1304e3fe---85954928956.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bc14bfa2fe8---sorijiliditibirej.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f384427dd---99441919281.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/jufisumivedozafalibesima.pdfIn PDF document text
    • http://ledson.ru/upload_picture/31532881266.pdfIn PDF document text
    • http://iehyun.com/editorupload/file/49124341876.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160830fb71d20b---63372816126.pdfIn PDF document text
    • http://burragebrothers.org/demo/jolie/beta/userfiles/files/24353078625.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=natural+point+tonkinesePDF 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_off0000ec58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC58 10412 bytes
SHA-256: dc1403f60f25a1b32a11b91554fd8be6c98847db088a051017e457348770691d
font_01_sfnt_off0001040b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040B 17416 bytes
SHA-256: 7611262790281c42b855b529017d4e90f75f69caccf7debda1daa5f2c9fa9cfe
font_02_sfnt_off00013189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13189 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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