Malicious PDF — malware analysis report

Static analysis result for SHA-256 be98177032ad8b21…

MALICIOUS

PDF

69.0 KB Created: 2021-10-02 09:12:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 150ccfd9dff008c1693a91a82f0a06df SHA-1: 652ebb64a155e924420f4bb2c7610458a19cc606 SHA-256: be98177032ad8b219dd2b80bb32a049afe2f28fea51c480c8d24152b8fd0fcff
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised CMS uploads or disposable hosting. The heuristic 'PDF_IMAGE_LURE' indicates the document likely uses a screenshot to trick users into clicking, a common phishing tactic. ClamAV detection and ML classification strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://synerhu.ru/uplcv?utm_term=bible+verse+about+cursing+others PDF link annotation
    • http://pytextiles.com/userfiles/file/wakaxosuvakanesopegipug.pdfIn PDF document text
    • http://yuanhebiotech.com/upload/files/kivezebibevumerezop.pdfIn PDF document text
    • https://trickapotisk.cz/webpagebuilder/ckfinder/userfiles/files/22890783227.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139bc5b15780---sefejasimewugelejid.pdfIn PDF document text
    • https://giyimkent.formenemlak.com/upload/ckfinder/files/wilunadakazonusumaj.pdfIn PDF document text
    • http://hujiangsy.com/upload/files/34231284229.pdfIn PDF document text
    • http://getrade.net/uploadfiles/file/winezebozorazoponos.pdfIn PDF document text
    • http://phunggia.biz/userfiles/file/noboba.pdfIn PDF document text
    • http://kukdae.com/files/fckeditor/file/zepufekeribarelusenoj.pdfIn PDF document text
    • https://retrofitoman.com/ckfinder/userfiles/files/98175277119.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161348cff2f172---vogobifonixafuxaruruje.pdfIn PDF document text
    • http://positiveforce.in/uploads/files/88150670541.pdfIn PDF document text
    • https://aromamarketing.md/img/files/xisawarug.pdfIn PDF document text
    • http://shiraz.sk/ckfinder/userfiles/files/lananiwuvoge.pdfIn PDF document text
    • http://cephedanismani.com/images/pages/file/27705433727.pdfIn PDF document text
    • http://nessie-vinylcare.com/file/mepupinimiba.pdfIn PDF document text
    • https://samirkumarpaul.com/ckfinder/userfiles/files/lipuwegaro.pdfIn PDF document text
    • https://a-guskov.ru/uploads/files/kulofizuw.pdfIn PDF document text
    • http://mrspk.com/ckfinder/userfiles/files/71353325420.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613df6fab5d12---xukopotowadibazunevupazi.pdfIn PDF document text
    • https://pilot-nav.socksnbows.com/ckfinder/userfiles/files/zewevidosujise.pdfIn PDF document text
    • http://boschvietnam.com/files/usersfiles/files/wasotojaga.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_off0000b1d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1D4 10868 bytes
SHA-256: f08b927eccc9054f88fccf5dd904f637ea47a3e0ab6d14a28e4c4174a42628fd
font_01_sfnt_off0000cae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE9 14208 bytes
SHA-256: e5ebfba71f215069b6cd32ac2d1668cb9047b18d013fabe99a68ad52672a3b06
font_02_sfnt_off0000ee0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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