Malicious PDF — malware analysis report

Static analysis result for SHA-256 4119273eaec3b515…

MALICIOUS

PDF

85.2 KB Created: 2021-09-22 22:16:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 62912a2d746216bfaece1823a5b29d59 SHA-1: e613dc8be26546cdf08754ce3b0a9ae72cbc25a8 SHA-256: 4119273eaec3b5155bd3026bd988b94ae23915e64301bb3b19b7599033f3d323
176 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and exhibits characteristics of a phishing lure. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to distribute malicious content. The 'QR code redirect lure' heuristic indicates the document likely instructs users to scan a QR code, a common tactic for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 http://www.ecrivains-consult.fr/easyonline/ckfinder/userfiles/files/vugifapevajopamobo.pdf In PDF document text
    • https://fluffy-chins.com/images/file/votikalele.pdfIn PDF document text
    • http://knipia.com/userfiles/file/27280044431.pdfIn PDF document text
    • http://resumesfromabove.com/userfiles/file/33328241120.pdfIn PDF document text
    • https://manhalhealing.com/userfiles/file/30472993687.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/9mjlt5qkj7p16ntkl52qfm3832/22254499901.pdfIn PDF document text
    • http://jawarakreasi.com/file/77296269797.pdfIn PDF document text
    • http://keyflounge.nl/userfiles/file/34296583684.pdfIn PDF document text
    • http://tion.hu/upload/file/gimumil.pdfIn PDF document text
    • http://daphongthuyhueminh.com/uploads/image/files/78785959271.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/tna0ahsgbq28lovp3rmqttn1rn/67410572982.pdfIn PDF document text
    • http://szyoujin.com/UploadFile/file/20210913150839430.pdfIn PDF document text
    • https://kuni.ro/app/webroot/files/userfiles/files/37415807325.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/defovafa.pdfIn PDF document text
    • http://gartenbaukoeln.de/uploads/files/20889386284.pdfIn PDF document text
    • https://geniodelweb.com/file/nekofixasijovozenala.pdfIn PDF document text
    • https://navliecky.net/userfiles/file/pigafulevojoza.pdfIn PDF document text
    • http://serenetour.com/image/upload/File/vomonadefezox.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/d54896d5b89c82befb71f2989060436b/fuxawukep.pdfIn PDF document text
    • https://citronixdeflection.com/nbloom/fckuploads/file/jakoxa.pdfIn PDF document text
    • http://webinaris.net/ckfinder/userfiles/publics/files/60650003923.pdfIn PDF document text
    • http://pepinieres-soupe.com/userfiles/file/77680159044.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/36564364546.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161375190d7d07---janekanu.pdfIn PDF document text
    • https://saleskerala.com/ckfinder/userfiles/files/12739851017.pdfIn PDF document text
    • https://lengthening-sldf.com/userfiles/file/wurijopuzejusabexapul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=how+do+i+use+my+iphone+to+scan+a+qr+codePDF 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_off0000e67c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67C 11172 bytes
SHA-256: c21a57a58d0450068417123e6822a7a6040aa41b0d4e2672bfe23f6dc9d2cb25
font_01_sfnt_off00010044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10044 17668 bytes
SHA-256: feb396653b14537b6bcfe766ed796bf3d8875d136dbb09e86f5ccb7b492e2a3f
font_02_sfnt_off00012e72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1