Malicious PDF — malware analysis report

Static analysis result for SHA-256 998bdb37c7f7cbc0…

MALICIOUS

PDF

72.1 KB Created: 2021-06-05 06:12:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 4203f150698592a55cf3503735b6fe73 SHA-1: 4aa7eb20b8a879c32a88d92dbbf48504ba26830d SHA-256: 998bdb37c7f7cbc0ead3745d369ef5d0aaf00e8607cd11747c3854b53d25a1c5
156 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which appear to be compromised WordPress installations used for hosting malicious PDFs. The document body suggests a lure related to 'Garmin forerunner 305 charging without cradle', likely intended to trick users into clicking malicious links. The presence of multiple external URIs and the ML classifier's high confidence score indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://allytemp.ru/uplcv?utm_term=garmin+forerunner+305+charging+without+cradle PDF link annotation
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa2979fa53---66966673478.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/favivitabubiwolob.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/293e3a2d39c3b074534973662960c6bc/litig.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/e2f131d592996ac8ef1a57d0f9b1f69f/99833240752.pdfIn PDF document text
    • http://bannails.com/fckeditor_userfiles/file/nitoligagegorupi.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/oqrnulqbes313spjg6cu0nrr5t/63248041409.pdfIn PDF document text
    • http://eurekaelearning.com/upload/news/file/pozodowi.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0297337001619775180.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/d0947a67502eb23d82d76e8b66053762/tojubegejabujo.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/vodibejisozaz.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1609e4929cb221---nesetefujuxelisoni.pdfIn PDF document text
    • http://babamoleskine.com/files/file/91433287959.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/ba7b276838485b57f1930bb43b701f21/palegodafadugobazosa.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/juvegeferutudubixovut.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/60150289008.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608da32928cb8---27853529059.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/689c4ede577daa5178b9237da5bf8000/doxafusonutukiwedutu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F1 5808 bytes
SHA-256: a94da51d97a5ae559c283175d2b74f7e1954b21d79f6bc049714331e7c1ab5cd
font_01_sfnt_off0000eca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA7 11128 bytes
SHA-256: 9de89a408fa22ad52955425facb90ec33ecc1d4a24389f3bf3509a5f324869f9