Malicious PDF — malware analysis report

Static analysis result for SHA-256 f48d8ad537473d9c…

MALICIOUS

PDF

79.0 KB Created: 2021-09-19 06:58:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2a0a5be0886137e90a89545dea2a91c2 SHA-1: f34a828ee561e4390570ae7dae8fdcc91094b490 SHA-256: f48d8ad537473d9cd2f5cd6067404ae0095ffc841be95e72f059ebec22336692
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external URLs, many of which are hosted on compromised CMS upload directories or appear to be part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://archism.ru/uplcv?utm_term=classic+bubble+shooter+arcade+game PDF link annotation
    • http://advertisingreports.info/assets/ckfinder/core/connector/php/uploads/files/45095775096.pdfIn PDF document text
    • http://www.artefuoricentro.it/js/lib/ckfinder/userfiles/files/dejunexapetal.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a488656dc7---85316396846.pdfIn PDF document text
    • http://peknanevesta.sk/media/file/41147434358.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145598c4115b---fazanev.pdfIn PDF document text
    • http://bio-scan.com/userfiles/file/26278930828.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/mumunat.pdfIn PDF document text
    • http://hstechno.com/userData/ebizro_board/file/7845243128.pdfIn PDF document text
    • http://tareeapartment.com/user_img/files/67805436305.pdfIn PDF document text
    • https://ottopianos.nl/files/tojevovivid.pdfIn PDF document text
    • http://vibratingsieve.com/d/files/disagujowisol.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613f295c0b8ac---tamije.pdfIn PDF document text
    • http://www.ez4parcel.net/upfile/files/2021/09/11/4815509840.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614408bc9b654---47250330975.pdfIn PDF document text
    • https://doxity.ro/ckfinder/userfiles/files/jexekudo.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/a277d9087e90e267700fa0ffb191a165/37449566014.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613dbe4adc88c---zumuguladikebaga.pdfIn PDF document text
    • http://redeyeldn.com/userfiles/file/geledopirajinokakiz.pdfIn PDF document text
    • http://canadapremiumlubes.com/survey/userfiles/files/42612801972.pdfIn PDF document text
    • http://old.smartplus.pl/ckfinder/userfiles/files/xuwabagufibuwa.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/5g0j8o8hbqclr8sa50q08pm5oi/najigos.pdfIn PDF document text
    • http://kieryk.pl/img/userfiles/file/buxitevenowexovemo.pdfIn PDF document text
    • http://hebammenglueck.de/ckfinder/userfiles/files/widuletutitemotefesu.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614174a0a8af6---fuxebovemeresoxugegavod.pdfIn PDF document text
    • https://wasael.com/userfiles/file/90890468783.pdfIn 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://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_off0000cde5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e5fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FC 10984 bytes
SHA-256: a6ddb2eeb306df507a666ebb4a898897bf20524cb7086d3ab5d4ca70736b304d
font_02_sfnt_off0000ff4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4A 18108 bytes
SHA-256: ac3c948d1612b113eae93a89cc63c768312be9695fbf733f30094572e8163aa2

Open this report in the interactive analyzer, or submit your own file for analysis.