Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1eaecc4271805ff…

MALICIOUS

PDF

81.3 KB Created: 2021-10-04 13:16:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 75e582e28fcd880ea108eba9f132ec7a SHA-1: b452d7acab8ce2326fed255a5bec5dff4f613141 SHA-256: e1eaecc4271805ff14e2885af2574d83162f8d6b2214252a699fbd6ebd500fc0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable domains or link farms, suggesting a phishing or redirection scheme. The PDF structure and embedded content are consistent with attempts to disguise malicious links or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://stellarp.com/userfiles/file/pukumopuzowepovubami.pdf In PDF document text
    • https://tourgardan.com/basefile/tourgardancom/files/15256991654.pdfIn PDF document text
    • https://b2b-intelligence.it/uploads/file/nawezonovunidosenan.pdfIn PDF document text
    • https://www.koreayokogawa.com/ckfinder/userfiles/files/74232352043.pdfIn PDF document text
    • http://talleresjpg.es/img/file/xikovagololojilepenewuju.pdfIn PDF document text
    • http://kammatrans.com/userfiles/files/31875997134.pdfIn PDF document text
    • http://keystoparadise.com/userfiles/files/7154007393.pdfIn PDF document text
    • https://chp-travel.ir/data/file/nesovabojuweroramozaga.pdfIn PDF document text
    • http://mindentudor.hu/userfiles/file/poludilorawosalevuz.pdfIn PDF document text
    • https://nocenzura.space/web/img/podborky/files/5805307497.pdfIn PDF document text
    • https://subded.org/userfiles/file/71799865206.pdfIn PDF document text
    • http://nationalherbo.com/userfiles/file/giwuniralizaxobixulox.pdfIn PDF document text
    • https://tigaintan.com/contents/files/putinosirovun.pdfIn PDF document text
    • http://hantechwelding.com/userfiles/file/2021091402472773499.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/748d970b96f2441416c516ac83a1513e/lokivezal.pdfIn PDF document text
    • https://dcimx.com/files/janeduvuxofifore.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/viu0lso7kkv6vakpgu2vv85l3a/zamimojakuzodud.pdfIn PDF document text
    • http://www.kymkarajok.net/tiedostot/files/29491234418.pdfIn PDF document text
    • http://millenium.moscowfashion.net/content/xuploadimages/file/madekixojejomadanuvidig.pdfIn PDF document text
    • https://echipamente-scule.ro/userfiles/file/razuzajilidujeximofaji.pdfIn PDF document text
    • http://belean.pl/userfiles/file/64596790459.pdfIn PDF document text
    • http://dorp.pl/userfiles/files/78550285229.pdfIn PDF document text
    • https://fengshan-zhennangong.org/upload/ckfinder/files/75702627929.pdfIn PDF document text
    • http://buddhavihara.net/userfiles/file/4175474371.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=in+my+life+rubber+soulPDF 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_off0000ce8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e69c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69C 21464 bytes
SHA-256: ac3796005300c3aef8b6e1106c2cf5deaaa952bd5661b7129bde76f1313e4718
font_02_sfnt_off00011ecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ECC 10420 bytes
SHA-256: bfbcfd787d14bc276de4a1d83b7691f4f9a2318818c560c4007c01db4cc11474