Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd0b0ce7fed4aa6e…

MALICIOUS

PDF

76.5 KB Created: 2021-09-10 21:30:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b08f5d43354b522783d8d71c4277bac0 SHA-1: 062cc91064251b642eb3c52da86690e3dd118227 SHA-256: dd0b0ce7fed4aa6e378ccb8e7279b58676bc46ef10a4d5a7b79b1ee4439a2765
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The primary intent appears to be redirecting users to malicious external sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://allytemp.ru/uplcv?utm_term=beyblade+burst+app+latest+version PDF link annotation
    • http://spamsmsgiare.com/media/ftp/file/98532021980.pdfIn PDF document text
    • http://glavis.biz/userfiles/file/55896535098.pdfIn PDF document text
    • http://highdesertrent.com/newsite/images/uploads/file/64019812353.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/52ba12d7027c38b6aedeb03de81b5bf3/20947796801.pdfIn PDF document text
    • http://autolavaggiocraparotta.it/userfiles/files/45193006704.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/e8f987307fe8913035581c0509f8897b/97806295531.pdfIn PDF document text
    • http://gazosilikatnn.ru/uploads/files/gajupa.pdfIn PDF document text
    • http://ibnuaffan.com/ckfinder/userfiles/files/94862920728.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/viviwo.pdfIn PDF document text
    • http://eternalcycle.com/FCKFiles/file/disuni.pdfIn PDF document text
    • http://www.parkwaytransplant.com/media_upload/upload/files/tadederugojisa.pdfIn PDF document text
    • https://egyseg.eu/ckfinder/userfiles/files/82807087755.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16135c2deaeda0---rexeveluwutowon.pdfIn PDF document text
    • http://henanshuangxin.com/d/files/dikofexagegilajodaluzis.pdfIn PDF document text
    • https://cardolf.ro/files/84182732607.pdfIn PDF document text
    • http://kaizousha.com/js/upload/files/96140469674.pdfIn PDF document text
    • https://cpsguffanti.com/uploads/file/pexux.pdfIn PDF document text
    • http://sprinter-lab.ru/content/File/85337436231.pdfIn PDF document text
    • http://stroyvodservice.ru/upload/File/gowapu.pdfIn PDF document text
    • https://doluhosting.com/calisma2/files/uploads/54824717272.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/37025672254.pdfIn PDF document text
    • https://mmrh.myagenda.cz/pictures/editor/files/lejexeduzosuxoxazuzuvepes.pdfIn PDF document text
    • http://obkladacstvikolar.com/content/21066125505.pdfIn PDF document text
    • https://marikakozmetika.hu/editor_up/91169994558.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_off0000bf70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF70 10860 bytes
SHA-256: caa0939fc7e4dcc2d895ba6d944813b7fb5c0a52c163ce7530b269d3abed1c28
font_01_sfnt_off0000d879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD879 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f08b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08B 19688 bytes
SHA-256: 0cd40a12d4f008464d3062bab0924ea496dde54b9d21039a3b9f716b31053665

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