Malicious PDF — malware analysis report

Static analysis result for SHA-256 0074d3725ef31a89…

MALICIOUS

PDF

83.7 KB Created: 2021-09-17 00:51:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 83808c7defb74ed07844a6bedf3e6a7f SHA-1: 893dc987cc47f529ff0a02ed94753ad60a42a29d SHA-256: 0074d3725ef31a892fb5d8dc738ec917eaabb64d480681851ca9833bcb0ca42a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous external URIs and link farms pointing to potentially compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution lure, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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.
  • 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://smidgel.ru/uplcv?utm_term=android+button+material+design PDF link annotation
    • https://goez1.com/10005001208290177/ckfinder/userfiles/files/6280860281.pdfIn PDF document text
    • http://noithatnhapkhaugiasi.com/luutru/files/57238916356.pdfIn PDF document text
    • https://salonrewards.ca/images/file/boxabajufuxama.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/moralifajukupewulu.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/c88f254b401c8067160c35f04bb45794/58013415135.pdfIn PDF document text
    • https://a-1commercialkitchenservices.com/ckfinder/userfiles/files/60677794061.pdfIn PDF document text
    • https://webornate.com/viking1/uploads/files/gabawinabutoda.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/rivimalopodoro.pdfPDF link annotation
    • http://realestatespoznan.com/uploads/97524599401.pdfIn PDF document text
    • http://daegyung.kr/userfiles/file/20210912172332.pdfIn PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/83818491346.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/0d1d0a97bfc273d3b9df884216596662/39406585120.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///kowuwokaruzutow.pdfIn PDF document text
    • https://premium-house.uz/images/file/11990830863.pdfIn PDF document text
    • https://listocrm.com/userfiles/files/nofikozufajerabexosu.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/16143b6a6c11d8---15333621791.pdfIn PDF document text
    • http://sochi-riba.ru/ckfinder/userfiles/files/vaxujotuxi.pdfIn PDF document text
    • http://tetrafluoro.com/upload/files/ladenisofulesokumuxa.pdfIn PDF document text
    • http://harringtonassociateslaw.com/Test/JabzMedicalBillingService/userfiles/file/2135536834.pdfIn PDF document text
    • http://topliving.sk/userfiles/file/kevipevezigigemanad.pdfIn PDF document text
    • http://propertiesforrent.com/userfiles/file///sikumuxumetigoxabudu.pdfIn PDF document text
    • http://gasthaus-steinkirchen.de/img/editor/file/lisixupulerom.pdfIn PDF document text
    • https://breedlife.com/upload/files/40761157419.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_off0000e102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE102 10812 bytes
SHA-256: af74e653afecda3a26f5d9d19e78da751983bf32af8820d878432f126616e2d3
font_01_sfnt_off0000f9b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000111c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C9 18112 bytes
SHA-256: abae318846d333283c7e706f46c34588ecdc6db1eb0094b037898a5b8a6843bc