Malicious PDF — malware analysis report

Static analysis result for SHA-256 05488d2186860c89…

MALICIOUS

PDF

80.8 KB Created: 2021-09-15 12:08:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 02aa72b65fee964d349f518378958448 SHA-1: 0558e17f60db49f15ab86bf240aa64bea8424a68 SHA-256: 05488d2186860c89bdfbc1381865373dd655ca683c41da135f9fa1e65a355ae5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URI heuristics and link farms points towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://cableesmaltado.com/d/files/widemaxigaxoxixu.pdf In PDF document text
    • https://greenlandpark.com/uploads/files/fozajuwemodukuze.pdfIn PDF document text
    • http://pijntherapie.be/uploads/files/64900798916.pdfIn PDF document text
    • https://angkagenap.com/contents/files/54757902578.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130db9ebefbf---zogeziviw.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/161413f86ab0e4---rogegiximu.pdfIn PDF document text
    • https://lwim-ouargla.dz/ar/files/79378541279.pdfIn PDF document text
    • https://thai-airpark.com/ckfinder/userfiles/files/gasevazigepojawodumadep.pdfIn PDF document text
    • https://iskoruma.com/upload/ckfinder/files/zuxufumuturalatenina.pdfIn PDF document text
    • http://pujcovnanaradi-tvarozna.cz/userfiles/files/51608612036.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee7267cac8---21485900667.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/6432462846141a5a372c19.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135b633a8d13---20648468408.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614148d27a736---1934083349.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1613add5b78ad7---makozuveneditab.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/1372932898.pdfIn PDF document text
    • http://kapfenberger-schuetzenverein.at/userfiles/file/36124233780.pdfIn PDF document text
    • https://dondepodemosir.com/userfiles/file/22931324961.pdfIn PDF document text
    • https://orig-shop-gsm.ro/ckfinder/userfiles/files/sikufowuwofubunaruzapar.pdfIn PDF document text
    • http://traviet36.com/upload/files/18396075456.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/pkl1ge524eee9ran4cgnua131b/92637830772.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1613b61e3e223f---gatifid.pdfIn PDF document text
    • https://sailstudy.in/ckfinder/userfiles/files/siwubuxedasenalineze.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613889364fb9e---felana.pdfIn PDF document text
    • http://eclickapps.in/userfiles/files/53522012502.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=download+vidma+screen+recorderPDF 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_off0000d1e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FD 10588 bytes
SHA-256: c077d722df1f974418f1d3b376894990ed0526b66a169f0bbb6adef65b211599
font_02_sfnt_off00010224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10224 19472 bytes
SHA-256: d23db3481bfb2b5381183d1f743a79f30a5c054c7873a4855738554ce53cf268

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