Malicious PDF — malware analysis report

Static analysis result for SHA-256 048ee1433e3aa88a…

MALICIOUS

PDF

89.6 KB Created: 2021-07-06 11:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2eb7b21ad15770a2a29f65425f469f39 SHA-1: 64c885ef364f9a0110571ab2826c09c6c1309589 SHA-256: 048ee1433e3aa88a20b5afb0983b6bf2c4f0791fafe3ecccd536651661e26bb2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.001 Process Injection T1204.002 Malicious Link

The PDF contains a link farm with numerous URLs pointing to compromised CMS upload storage and disposable hosting, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://futuresbuilder.net/dayafter/uploadimages/newsimages/file/sugiwugatoxegiwi.pdf In PDF document text
    • http://georgekoldun.com/var/upload/file/jixolutiwuf.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1607de72ce2d74---64554855504.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075100c36e5e---31602593671.pdfIn PDF document text
    • http://waypl.pl/upload/File/19168967409.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/2294823b1914bc8869561425bc60ae0d/terigofaf.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606e32ba9245b---86323926449.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/16074976a60627---kezamusekil.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160888ef9b638a---38252538247.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/fd2a96deed8b1f82e66f5953792db99f/xatarugijivasabukeloluki.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/fitakivitugapuvexepubube.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/korekek.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/gefonarasa.pdfIn PDF document text
    • http://studiotecnicoarduini.eu/userfiles/files/lixusitonejusubozuxusiris.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/901e1ba96e3e06ca60e808a5dfbcd41b/49937000932.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16079296ab9109---tisikidegifofisij.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/97270363952.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/7907abb59eb477e3e145e9f78f19827f/digumuwetab.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/bddc22b06642f1d4dc4f306a2c4fc236/wonawi.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/96921973820.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/cebde58e33fa84e58da023b162d724db/wivofulunagugatefewi.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/kupuzasebogijatovag.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/kasavoxadijexope.pdfIn PDF document text
    • https://propertiproperty.com/Uploads/userfiles/files/65102955347.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ee87a5f43---fujexakazosafe.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/dfb3f1468e54cd694c0d8ea2bbc89aec/42165932992.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=hack+for+soul+knightPDF 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_off0000fb15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB15 17480 bytes
SHA-256: 0393da8996fb8e931823fbd97325a3e1430a79e37c3b719bd1dfa469eddcf27b
font_01_sfnt_off000128cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128CD 10664 bytes
SHA-256: 22362237f21f2bdc68e7b31f9ccd75a236dc15c3ff962b4ebe33f324bd2a3306
font_02_sfnt_off0001412d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1412D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1