Malicious PDF — malware analysis report

Static analysis result for SHA-256 d32dae195e1fc871…

MALICIOUS

PDF

108.2 KB Created: 2021-09-07 07:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 21a0fc5817443579728e64c77c2bfb07 SHA-1: ebdcd8c9583f64da7ae16f27dce9066437b73c2b SHA-256: d32dae195e1fc871475ac22b8132fdc85ffea8dd814f3afeb5e2beb508725c5d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as a malicious PDF by ML classifiers and ClamAV. It contains a link farm pointing to multiple distinct hosts, several of which are hosted on potentially compromised CMS upload directories. The presence of numerous unknown URLs suggests an attempt to direct users to malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/92b49b97165779bd44bf91d29adfc1d6/pebumube.pdf In PDF document text
    • http://www.sas.edu.mn/ckfinder/userfiles/files/paxonotojosukujim.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/36096854254.pdfIn PDF document text
    • https://xuanhongkhang.com/upload/files/naxifaper.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/p7ch4m9u7sl3bdicpk567i0j0t/bedodadirememomokojutug.pdfIn PDF document text
    • http://zonwering-belgie.nl/ckfinder/userfiles/files/supopuxabakufozazigeb.pdfIn PDF document text
    • https://atpl.aero/ckfinder/userfiles/files/xazegipabizosazazu.pdfIn PDF document text
    • http://yljczl.com/uploadfile/20210804015719609.pdfIn PDF document text
    • https://airbays.com/userfiles/file/fovom.pdfIn PDF document text
    • https://tl-systems.hu/files/files/bidoluwaraminupobafuv.pdfIn PDF document text
    • http://malbreil.com/userfiles/file/69263010035.pdfIn PDF document text
    • http://meyras-tourisme.com/ressource/site-image/files/30212603817.pdfIn PDF document text
    • http://the-bom.kr/upfile/files/velowoxavak.pdfIn PDF document text
    • https://iwnta.com/userfiles/file/xurabamiwadunov.pdfIn PDF document text
    • https://mgrenginiai.lt/ckfinder/userfiles/files/duxitojejamenane.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/35638201388.pdfIn PDF document text
    • http://alltechsro.cz/files/bepupojadizereporujije.pdfIn PDF document text
    • https://cortemadera.com/wysiwygfiles/file/16654352755.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/44ec12e8a1ab363d493f79bc98e3a8ab/59629605509.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4f440ea6c---49424268649.pdfIn PDF document text
    • http://xn--2-140-swe8h.xn--p1ai/files/mexuladuso.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/h1i9m9jrr05uvd3ggvncsidiga/tefavenelutipip.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b1e8c37d348---1439253501.pdfIn PDF document text
    • http://scandirent-new.ru/uploads/assets/file/27416882537.pdfIn PDF document text
    • http://teleinwestor.pl/userfiles/file/zaxetesukiranutuj.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/46428328599.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=stanzas+in+meditation+pdfPDF link annotation
    • 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_off00014155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14155 18860 bytes
SHA-256: 78374cf07e945dd8ca93c2c24ac38cc6b91a5238bccfc0694c71df13033a3dd5
font_01_sfnt_off00017247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17247 10648 bytes
SHA-256: 2fa4bdb9f1662a8190861246e58f1f28b9a6c3797eadbb9f40e0e82584f8c570
font_02_sfnt_off00018aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18AA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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