Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0cdfc9e198580a0…

MALICIOUS

PDF

73.9 KB Created: 2021-10-19 10:20:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 05c9b01a0b8856e07701a79d49af9f68 SHA-1: 210e6b24f7229a6717c88058355374eb12513bcb SHA-256: f0cdfc9e198580a06423d53cec69bf19d7553926100fd8e654621a292fbaf375
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to disposable hosting sites, a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and URI heuristics suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://140.121.180.103/ckfinder/userfiles/files/8119826584.pdf PDF link annotation
    • http://dragoniresorts.com/userfiles/ziwomalobojevogiwoga.pdfIn PDF document text
    • https://softnettechno.com/sribati/editor/uploadfiles/guberufagu.pdfIn PDF document text
    • http://gustosandvic.com/ckfinder/userfiles/files/tobebamezubedagigenugo.pdfIn PDF document text
    • http://barbusci.it/maisUserFile/file/lavusitigarapul.pdfIn PDF document text
    • http://xn--aknmedical-yub.com/uploads/file/16683900390.pdfIn PDF document text
    • http://trongtinpc.com/luutru/files/73093883953.pdfIn PDF document text
    • https://vwb.mrv-educationservices.com/content_file/files/fegejukizakekavulu.pdfIn PDF document text
    • https://allcondosales.rodeodrivecondosale.com/userfiles/files/kevage.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16162708d6a41f---movosota.pdfIn PDF document text
    • http://abyss.sk/userfiles/file/davuwovikolupodowo.pdfIn PDF document text
    • https://tmtteks.com/files/zosekizibifavulutiwe.pdfIn PDF document text
    • http://mskgroup-spb.ru/upload/file/21066228436.pdfIn PDF document text
    • https://dakhoathienhoa.net/images/files/80339926206.pdfIn PDF document text
    • https://majubesar.info/contents/files/wuregovokuzamoz.pdfIn PDF document text
    • http://e-instar.com/userfiles/file/65611935796.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16154275d1ce52---pujavekusenarig.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/kitakomafa.pdfIn PDF document text
    • https://implantsdentairesdesmoulins.com/upload/editor/file/76134405677.pdfIn PDF document text
    • http://4yoga.by/pics/files/binosatefugob.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/ronetoropazekatanajapep.pdfIn PDF document text
    • http://bjdfszwy.com/filespath/files/20211012033047.pdfIn PDF document text
    • https://hohsingfiber.com/ufiles/files/21028088856.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/xPAns0MRe5M/uplcv?utm_term=melhor+doutrina+de+direito+tribut%C3%A1rioPDF 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_off0000bba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBA2 17836 bytes
SHA-256: 3faec850a3bf046fa4c2830f970b5bcaf5d9161e3efc222e269d212939d48908
font_01_sfnt_off0000e81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10033 10592 bytes
SHA-256: 54a2f0fcaadfa507e31fe4b9c4455bbf1a72ce4e9087b8490045fc8916c87ff3