Malicious PDF — malware analysis report

Static analysis result for SHA-256 adaa8fded974094f…

MALICIOUS

PDF

81.1 KB Created: 2021-09-20 03:44:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 401ea95639431486fcce292dca03d5ac SHA-1: bb1f115913f9321194d3aefa38de20e3bdb001f0 SHA-256: adaa8fded974094fb46e6fe31928f7c19ceb087bc999cfe89185fa081fa7c10e
126 Risk Score

Malware Insights

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

The sample was flagged by ML and ClamAV as malicious, with heuristics indicating it is a link farm on disposable domains. The embedded URLs point to numerous PDF files hosted on distinct, potentially malicious domains, suggesting a phishing or malware distribution campaign. No scripts were extracted, limiting the analysis of specific execution chains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • 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.
  • 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://1careglobal.com/upload/files/ruduwowewe.pdf In PDF document text
    • http://sinorarechem.com/upload/files/zorenukajeji.pdfIn PDF document text
    • http://taiwan-tsai.com/upload/files/jejemewebufefagatikeze.pdfIn PDF document text
    • http://tylincms.com/userfiles/files/tenepirijo.pdfIn PDF document text
    • https://biographiewerkstatt-singer.de/userfiles/file/64398358120.pdfIn PDF document text
    • http://godsownproperties.com/userfiles/file/xiwakubejovofoda.pdfIn PDF document text
    • https://pfollowers.com/ci/userfiles/files/52852811242.pdfIn PDF document text
    • https://jlgardner.org/home/jlg/public_html/ckfinder/userfiles/files/95441843810.pdfIn PDF document text
    • http://mannaz.pl/userfiles1/file/50686472987.pdfIn PDF document text
    • http://akcihlar.cz/userfiles/file/duzup.pdfIn PDF document text
    • https://airbays.com/userfiles/file/51920199078.pdfIn PDF document text
    • http://veszpremlizards.hu/_user/file/74089672005.pdfIn PDF document text
    • http://naturabliskociebie.pl/userfiles/file/xeroxosuxapuxerevojukoli.pdfIn PDF document text
    • http://kronospan-mofa.hu/editor_up/mulituduvuwen.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/dofajer.pdfIn PDF document text
    • http://seowonbattery.com/files/fckeditor/file/202132845614584a28bc10.pdfIn PDF document text
    • http://esistore.com/userfiles/file/bujus.pdfIn PDF document text
    • http://sin-hua.org/userfiles/sewikepixizaminadu.pdfIn PDF document text
    • https://aimtronu.org/userfiles/file/jelimagofiliderorovis.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613969d7aa194---7935566390.pdfIn PDF document text
    • http://palyavalaszto.hu/teszt/upload/file/89700408486.pdfIn PDF document text
    • https://windscrm.net/files/file/jegeviwinigorobi.pdfIn PDF document text
    • http://servmed.net/userfiles/file/degolixo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=how+to+draw+peppa+pigPDF 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_off0000dac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC7 10324 bytes
SHA-256: 6749b5fe2194459732dca4d97a9d0648bd29587e12ffa6434f36bcf3310a9ad3
font_01_sfnt_off0000f1f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F4 17536 bytes
SHA-256: d982cec7a050c0020f60ca8f254c0ec3c7a4b24c5549c99c352e1bec26b43c1b
font_02_sfnt_off00011f1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F1A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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