Malicious PDF — malware analysis report

Static analysis result for SHA-256 247d90b09665d780…

MALICIOUS

PDF

85.1 KB Created: 2021-08-18 20:24:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2b06aa8e06df810b9f448c6fd9789d65 SHA-1: c87b5045e6242ada0710522f67f787225d11e198 SHA-256: 247d90b09665d780c9a5751bd89465cb73792208ce336788e8f83a2309a47936
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is identified as a link farm, likely intended to redirect users to malicious websites for phishing or malware delivery. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's part of a phishing campaign, potentially leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://ketchas.ru/uplcv?utm_term=breath+of+the+wild+complete+guide+book
    • https://mingyi-lock.com/data/file/userfiles/files/44507110956.pdf
    • http://garmagostaran.com/Upload/file/39597823673.pdf
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/71583270096.pdf
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083d07c35db1---jowefidedaditiwuzuzu.pdf
    • http://xn--80aafjbaeihgganggf9ajkncugh2a.xn--p1ai/pict/file/8440881488.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1611c8ae367025---96331325267.pdf
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/85126841635.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b201af3414---73126921267.pdf
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/a944da8dfa4acf1d96a4b037a54f07e1/zezuponoji.pdf
    • http://razaviota.ir/basefile/razaviotair/files/54393822739.pdf
    • http://yanartekstil.com/firma/files/83129257303.pdf
    • http://mbcasc.net/imgs/file/1871383088.pdf
    • http://teleinwestor.com/userfiles/file/81103269378.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608548da79a40---bodifesedexome.pdf
    • http://permanentnimakeup-brno.cz/userfiles/files/23836139561.pdf
    • https://speakingparrot.com/upload/ckfinder/files/51340877226.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16093e72c8a99f---kupififejowuwol.pdf
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/baa4a3d7b8206a2ecd268fcfe89ced61/63774962475.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff005436ca---91121624598.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e668aaa37---72945193461.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16083dc78cf367---kuviwoxezadikiwuzuxo.pdf
    • http://luvnchrlysenglishtoys.com/clients/861429/File/korufib.pdf
    • http://learnersdigest.org/userfiles/file/vumos.pdf
    • http://4bzsoftware.com/Images_upload/files/90484423889.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3b5.bin
149d2184eb4752a5060208a1e514aa2fd9f3ff71d3508da7487979ce0f15a4d1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B5 18012 bytes
font_01_sfnt_off0001135d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1135D 16792 bytes
font_02_sfnt_off00012b74.bin
2b416b6ff3737c7d6a1bac92252f901b5ec9084d723434ffd271e1d8f5eca47e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B74 11264 bytes