Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1747308566f1bf4…

MALICIOUS

PDF

81.7 KB Created: 2021-09-11 03:27:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2a02cf9b28c6be31f69b0b2831637429 SHA-1: 702fbf610128e2d23911e51fbfab37933ec0b20b SHA-256: d1747308566f1bf407be49fd9f9e3c88ce6a3a5dcc549bad95daa39655f2001d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to various compromised websites and disposable hosting, likely for phishing or malware distribution. The embedded URLs, such as 'https://nomylo.ru/uplcv?utm_term=mind+platter+free+ebook', suggest a lure related to free content to entice clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://nomylo.ru/uplcv?utm_term=mind+platter+free+ebook PDF link annotation
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613bf64e2e9f7---tobasulopevupuxuvasoxasam.pdfIn PDF document text
    • http://ipsaix.com/ckeditor/ckfinder/userfiles/files/40797193230.pdfIn PDF document text
    • https://bdprescription.com/ci/userfiles/files/rufuludijulowegimot.pdfIn PDF document text
    • http://nktrading.qa/file/files/zubaxumebokaxot.pdfIn PDF document text
    • http://s13cf5ef.alojamientovirtual.com/ropadefutbolbarata/userfiles/file/vexamoteparuganu.pdfIn PDF document text
    • http://purepoem.com/resource/docContentImg/file/2021-09-11/20b1b470e00e15b4c8401a9b44164c2d.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/67159510758.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613277af14653---92605660686.pdfIn PDF document text
    • http://miroslaws.com/ckfinder/userfiles/files/jiwuraxus.pdfIn PDF document text
    • http://mylodge-naoshima.com/dutidijoxotodefofuzofi.pdfIn PDF document text
    • https://szallas-karpatalja.net/upload/4481384247.pdfIn PDF document text
    • https://ikorti-iao.com/userfiles/files/gawominasugupavo.pdfIn PDF document text
    • https://studiovizia.com/webroot/img/content/files/54972763421.pdfIn PDF document text
    • https://tekstilkentrehber.com/upload/ckfinder/files/57097988129.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16135492e6312b---63816101561.pdfIn PDF document text
    • http://happyhanool.com/ckupload/files/lutexugabusivebotuli.pdfIn PDF document text
    • http://preciz.com/uploads/wysiwyg/files/92815789651.pdfIn PDF document text
    • https://manhremhoangvan.vn/wp-content/uploads/files/17360706136.pdfIn PDF document text
    • https://mackbeks.com/files/file/banuwajepamipitilepin.pdfIn PDF document text
    • https://groupekineconcept.com/userfiles/file/tatojojigemupemuwa.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/xagivufenaxixikowuwati.pdfIn PDF document text
    • http://metallpress.info/files/xonelojidu.pdfIn PDF document text
    • https://marblo.ph/app/webroot/img/files/97454326107.pdfIn PDF document text
    • http://hotelborgodeipoeti.com/userfiles/files/79936791927.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_off0000daa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA3 18088 bytes
SHA-256: f0438ffa5973cec2db163a3e703802a9608aaf27cbb166b3ae535e1b5a6e24ce
font_01_sfnt_off000109b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C9 10548 bytes
SHA-256: 92d7f995ba15e5497b653a29dfc85e9c4be3db20a00197063abfee056991cdc6

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