Malicious PDF — malware analysis report

Static analysis result for SHA-256 40b161e3dcd32eb7…

MALICIOUS

PDF

80.9 KB Created: 2021-09-18 03:17:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 40876fbf82c5ff9d47b6a76a09d8c6ad SHA-1: 16cbfed6ee0033efa3926236617013097fb85021 SHA-256: 40b161e3dcd32eb79c23bfb1e342953a3f21f8a3efc33ada88168c3bc9b77226
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. The 'SE_QR_LURE' heuristic indicates the document likely instructs users to scan a QR code, which would lead them to one of the provided malicious URLs. The presence of JavaScript in the URL query parameters suggests potential exploitation of web vulnerabilities or redirection to malicious scripts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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://eviljoy.com/UserFiles/File/98951468736.pdf In PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/fe62ebfd65a2b1777f8b24bc738b8525/27899435010.pdfIn PDF document text
    • https://xtremefitness.com.au/application/third_party/ckfinder/userfiles/files/34552678443.pdfIn PDF document text
    • http://chekeeh.ir/basefile/chekeehir/files/guwotazawapemifap.pdfIn PDF document text
    • https://travelone.ae/userfiles/files/80747874687.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/files/faxipib.pdfIn PDF document text
    • http://jfhconsultancy.nl/userfiles/files/xobisinukafe.pdfIn PDF document text
    • http://constantemail.com/userfiles/file/1630690413kufepakaxonexupazovosawo.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/83214068965.pdfIn PDF document text
    • https://esprimagroup.com/userfiles/file/78721570795.pdfIn PDF document text
    • http://votava2.altrodesign.eu/ckfinder/userfiles/files/surewapaguruwodena.pdfIn PDF document text
    • http://miraesusan.com/ckupload/files/fefilomiduwigutaburomu.pdfIn PDF document text
    • https://planet-pvc.com/upload/files/67455500214.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161361fa727663---raxanukoli.pdfIn PDF document text
    • https://vidaleve.ind.br/ckfinder/userfiles/files/fusamobupezojame.pdfIn PDF document text
    • http://longvu.vn/Images_upload/files/59553503129.pdfIn PDF document text
    • https://comillaspostgrado.es/userfiles/file/82229161173.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/35641236947.pdfIn PDF document text
    • http://euro520.net/userfiles/file/1630573222311428173.pdfIn PDF document text
    • https://atiksigorta.com/files/kerosoxora.pdfIn PDF document text
    • http://tiramisu-o.com/yamituki-n/uploads/files/gobamiropi.pdfIn PDF document text
    • https://cleanenergy.mn/uploads/files/17685851202.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=qr+code+javascriptPDF 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_off0000d8ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF116 10612 bytes
SHA-256: 09ef36adf41b188456e6ccdd4bce72ae4820e79f803f316ee5b4ed9c0c2e04c6
font_02_sfnt_off00010989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10989 17444 bytes
SHA-256: 36bcc2264b377165f5b2781d2d2cefa10ef85ad86d2c2eeddeae5ca5be410068

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