Malicious PDF — malware analysis report

Static analysis result for SHA-256 d29d1ade8b82a7a5…

MALICIOUS

PDF

80.4 KB Created: 2021-09-13 00:14:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 35da60b5e910b2c60e25d7565cd6cc59 SHA-1: 58e48373b821c1bdd7198c544c4b8eea1c2ebc8d SHA-256: d29d1ade8b82a7a5a486fecc150266a072720248595d7464f6313422b7f1be01
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates the document is part of a link farm on disposable hosting, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://kamennykoberec.eu/editor_uploads/system/files/9862550946.pdf In PDF document text
    • http://classiccar-jp.com/js/upload/files/14961828168.pdfIn PDF document text
    • https://illustrations.noche.fr/images/files/dirakujivinox.pdfIn PDF document text
    • https://maciejabramowicz.pl/upload/files/file/zisokut.pdfIn PDF document text
    • http://hdg-gmuend.de/userfiles/files/56125851286.pdfIn PDF document text
    • https://produse-zilan.ro/files/40658734016.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/zujus.pdfIn PDF document text
    • https://pfollowers.com/ci/userfiles/files/gokafufako.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/15711420448.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/pomudadodikan.pdfIn PDF document text
    • http://theurbanbazzaar.com/userfiles/file/motaxalesagefoganavobuw.pdfIn PDF document text
    • http://www.perchegouet.com/ckfinder/userfiles/files/lobowomosoborugotexat.pdfIn PDF document text
    • http://eldorautomaticgates.com/UserFiles/file/21545056364.pdfIn PDF document text
    • http://thegioimercedes.com/upload/files/51992146207.pdfIn PDF document text
    • http://kingkady.com/uploadfile/files/niwid.pdfIn PDF document text
    • https://oxfordjsr.com/userfiles/file/kuxukujedubipavirok.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/fesanebe.pdfIn PDF document text
    • http://xn----ftbkdcamitb5h.xn--p1acf/files/fck/file/44136956391.pdfIn PDF document text
    • https://hotararicedo.ro/files/files/46369441110.pdfIn PDF document text
    • http://grimastone.ru/files/vetaxa.pdfIn PDF document text
    • https://praktijk.zorglink.nl/ckfinder/userfiles/files/dimixamufidumalur.pdfIn PDF document text
    • http://altadirezione-consulting.it/userfiles/files/begel.pdfIn PDF document text
    • https://fsbulletsandbrass.com/userfiles/files/dufuw.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/he2gmtt5t1a6qrvolutprct4h0/sezuzikubiberejavebanezo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=where+is+my+phone+memoryPDF 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_off0000d567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD567 18548 bytes
SHA-256: 069d7983201ffb19988dd5f13b80d0ff2081949f68112d455872bc4c1a767fb6
font_01_sfnt_off0001052a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D41 10316 bytes
SHA-256: fc8f62ed108b06492e6d7616a195ac3134e9165635f4236316cd058547e668f4

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