Malicious PDF — malware analysis report

Static analysis result for SHA-256 67cd3f6a0d5dd459…

MALICIOUS

PDF

82.8 KB Created: 2021-09-14 01:36:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f5138beb457a555c449aba93d9576100 SHA-1: 6813885ecfe8a4bbf554389cca3c57a99b066d95 SHA-256: 67cd3f6a0d5dd4596a66ee1c87ccca3b27d291411f73459f5045b13fc97636fe
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to other PDFs hosted on compromised or disposable domains. The primary purpose appears to be directing users to potentially malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/c7745b8922f7645d827476008527b85c/sedulabopugenodezo.pdf In PDF document text
    • http://iccjsc.vn/images/uploads/files/sabagu.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/tijinopon.pdfIn PDF document text
    • http://basumati.com/app/webroot/ckfinder/userfiles/files/finogevoli.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613966744a4c4---19946268627.pdfIn PDF document text
    • http://hsound.ro/images/custom/file/88473435555.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/517a71d78da3a119bb517729a0ddc61e/94477113869.pdfIn PDF document text
    • https://dwitunggaljaya.com/sitefiles/file/77287465015.pdfIn PDF document text
    • http://gesundezellen.com/neu/userfiles/file/givupokanasezafemi.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613815bf53d08---39309820546.pdfIn PDF document text
    • http://studiomalpocher.it/userfiles/files/34222145114.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/40140627981.pdfIn PDF document text
    • http://hieuchuan.com/upload/files/52619524370.pdfIn PDF document text
    • http://kayapaliinsaat.net/file/depuxeg.pdfIn PDF document text
    • http://fantasymusic.it/userfiles/files/94291546957.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/gapoxomimifavunatewagob.pdfIn PDF document text
    • http://studiotecnicopinto.it/userfiles/files/14085424930.pdfIn PDF document text
    • http://ahrestygz.com/userfiles/files/20210910_224626.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a0f2db0b28---55045060412.pdfIn PDF document text
    • https://perfecthospitals.org/ckfinder/userfiles/files/lupogewumel.pdfIn PDF document text
    • https://resicolor.com/upload/files/71488263913.pdfIn PDF document text
    • http://xingzhongjing.com/userfiles/file/20210904195434_326642694.pdfIn PDF document text
    • http://naturalwonders.com/uploads/files/vemago.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=scanner+premium+apkPDF 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_off0000df6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6A 10368 bytes
SHA-256: a62091e56c1c8f065fd6e12e9b3afefbcfce72273413d4ffdae8e9786d56f98a
font_01_sfnt_off0000f6cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CC 18036 bytes
SHA-256: 1470ed58734e7a0e967a6a5252b35b7464f2dc5a508678fc5d723d7ef334c7b9
font_02_sfnt_off00012582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12582 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.