Malicious PDF — malware analysis report

Static analysis result for SHA-256 49b0375d63d57b77…

MALICIOUS

PDF

69.4 KB Created: 2021-09-16 19:27:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1bc9912ff644a63eb7cb7d99819c5364 SHA-1: a1d40341e114cb6fef98a15989cdddf6ab12ed53 SHA-256: 49b0375d63d57b773b49015ffb6e0afbb11a4f93a5d9c38c6decaf53ba7bfd7c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting an attempt to redirect users to malicious content. The heuristic 'PDF_IMAGE_LURE' indicates the document likely presents a screenshot to obscure clickable elements, further supporting a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 1 text block(s), carries a click-outward action, and is only 69 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://coretry.ru/uplcv?utm_term=hello+neighbor+hide+and+seek+apk+obb PDF link annotation
    • http://kibunajcc.com/ckfinder/userfiles/files/titugalimubataz.pdfIn PDF document text
    • https://keralahappyjourney.com/ckfinder/userfiles/files/62431991942.pdfIn PDF document text
    • http://paneldeconso.com/userfiles/file/16676847630.pdfIn PDF document text
    • https://familienbilstrup.dk/userfiles/file/8132481736.pdfIn PDF document text
    • https://mpressivelabels.com.au/application/third_party/ckfinder/userfiles/files/boropapigumotenifop.pdfIn PDF document text
    • http://le-nora.com/userfiles/file/juruvipubovixokaliwuxu.pdfIn PDF document text
    • https://learn-atdi.com/uploads/files/basidinubiwunune.pdfIn PDF document text
    • http://powerfalcon.net/uppic/files/pelodexidiludawewuwoxad.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/161375936429b3---tulowak.pdfIn PDF document text
    • http://www.arborvitae.cz/ckfinder/userfiles/files/60743007170.pdfIn PDF document text
    • http://bestofbeer.ru/ckfinder/userfiles/files/wotipivavipu.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/0ujfhtc07pl0krthl4tahlv3e8/lajidixipipawesimifade.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/nosoxiruk.pdfIn PDF document text
    • https://tinhhoaxanh.vn/userfiles/file/70674337360.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613f9feb859bd---87373017345.pdfIn PDF document text
    • http://studiotrusso.it/userfiles/files/88229803473.pdfIn PDF document text
    • http://www.ks-klinika.ru/ckfinder/userfiles/files/rolabelezerogisokone.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/81205028562.pdfIn PDF document text
    • http://e68momo.com/shopadmin/upload/files/molube.pdfIn PDF document text
    • https://fgcrubochi.com.ng/ckfinder/userfiles/files/1102634211.pdfIn PDF document text
    • http://vaynhe.com/upload/files/85936663021.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/62dsh52hgeuogngqi9nvdhqfce/basutitonijugijiw.pdfIn PDF document text
    • http://ombs.ru/uploads/files/73710942078.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/0b41c82ed4d7ee4305649d1a49fa711f/59558110110.pdfIn PDF document text
    • http://kingtonkatsu.com/uploads/files/xunile.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_off0000b3a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3A9 14356 bytes
SHA-256: 1c096a15098c198ca301a7f94b68a534cd7372dae8d67f0e0c7de05a3cafece0
font_01_sfnt_off0000d729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD729 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ef40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF40 10796 bytes
SHA-256: 2a9dcb4b4849f56ab7355e12f5961e5c339499a99abfb2d9641eb1526e770964

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