Malicious PDF — malware analysis report

Static analysis result for SHA-256 d39f00294bcb280f…

MALICIOUS

PDF

70.5 KB Created: 2021-09-25 14:59:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a643c01cf82a1fb931388405047c0959 SHA-1: f9d385415ea5870ea93e4f3591da9ef82688002e SHA-256: d39f00294bcb280f08bf20c0b448e0ee4ecc5befe84e913aa3a414ac59fa7060
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a link farm pointing to compromised WordPress upload directories and disposable hosting, likely intended to redirect users to malicious content. The embedded URLs, such as 'https://infrive.ru/uplcv?utm_term=minecraft+pc+android+download+free', are designed to lure victims into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://infrive.ru/uplcv?utm_term=minecraft+pc+android+download+free PDF link annotation
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ifccpatm48trdsc6f1gq2n0tg7/45929427290.pdfIn PDF document text
    • https://riwg.in/userfiles/file/bonemujotatopude.pdfIn PDF document text
    • http://35ju.21tg.cn/uploadfile/ckeditor/files/zitovamurituvovap.pdfIn PDF document text
    • http://menifee.hanasushichoice.com/uploads/files/98450323215.pdfIn PDF document text
    • http://mbeautyconcept.com/upload/content_images/file/zalibolosisaxulaxorowo.pdfIn PDF document text
    • https://oncetrabzon.com/resimler/files/18873180944.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161417153bb77d---jusesusibovobanilu.pdfIn PDF document text
    • https://fcksa.com/ckfinder/userfiles/files/nozufuxorexapajiwisiwuk.pdfIn PDF document text
    • https://alpinismbihor.ro/app/webroot/files/userfiles/files/jimuxuxarutulogagij.pdfIn PDF document text
    • http://www.yevres.fr/ckfinder/userfiles/files/30310804683.pdfIn PDF document text
    • https://icbacademy.com/upload/files/mosefewogazudapowiz.pdfIn PDF document text
    • https://krygina40.ru/UserFiles/File/33002474710.pdfIn PDF document text
    • https://www.sterlingsez.com/ckfinder/userfiles/files/ravedevazorebiwimor.pdfIn PDF document text
    • https://istanajp.com/contents/files/jukezok.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/170f8945ef9da61f64671e5374c00826/zubegatefusuvutedi.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/53252953230.pdfIn PDF document text
    • https://cleartunemonitors.com/ckfinder/userfiles/files/49886491494.pdfIn PDF document text
    • http://ksklinika.ru/ckfinder/userfiles/files/65641318589.pdfIn PDF document text
    • http://zaiger.ru/img/file/bezosotuzef.pdfIn PDF document text
    • http://anbao.vn/uploads/userfiles/file/sebimetegisodokujizagon.pdfIn PDF document text
    • https://steklo-shik.ru/userfiles/file/guzuvivuniwenapebari.pdfIn PDF document text
    • http://vilniausgreziniai.lt/userfiles/file/zikug.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134f0d35a21f---nalejimodo.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_off0000b315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB315 10524 bytes
SHA-256: 11ab81c8fe31ec38c05e9f62853caadf42b83107fb1dd8b17166673c0bf3d28b
font_01_sfnt_off0000cb33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB33 16332 bytes
SHA-256: d10c6a8ddd437afe78828772bf1b7f33953c1c697e30e6930066a18383990e31
font_02_sfnt_off0000f448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF448 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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