Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc7e0b8bcb8b40a2…

MALICIOUS

PDF

84.1 KB Created: 2021-09-23 04:02:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9051a1d14fd443865bc11dff19fa83b3 SHA-1: 7f5b70767ab1ca186ff4b1d5f7a459312b5758e0 SHA-256: bc7e0b8bcb8b40a2f53dfc4bd036232cc83ff71dddad3b64248c1a82966f373a
166 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics, including a high-confidence ML classifier and a specific rule for advance-fee scams. The document body, though heavily obfuscated, combined with the numerous embedded URLs pointing to potentially malicious PDF files, strongly suggests a phishing or scam attempt. The presence of a ClamAV detection further solidifies the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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 https://varbackaforskola.se/ckfinder/userfiles/files/fejewowewasozisew.pdf
    • http://cnsgawefgl.netsociality.com/upload/files/53769456163.pdf
    • http://sinice-rasy.cz/files/file/79656515369.pdf
    • http://wisdomtours.net/upload/file/72709742925.pdf
    • http://pyroglobal.sk/app/webroot/files/userfiles/files/70179347898.pdf
    • http://panel2conso.com/userfiles/file/13808498656.pdf
    • http://longbeach.ilovepokebar.com/uploads/files/21564283645.pdf
    • http://mps-india.com/userfiles/files/58483912974.pdf
    • http://studiopol.com/userfiles/files/nunujokegus.pdf
    • https://dukra.sk/editor_uploads/files/tonamipexunaguxozebe.pdf
    • http://longarmquiltingacadamy.com/fckeditor/userfiles/file/85974427254.pdf
    • http://geometrarontani.it/userfiles/files/25668649598.pdf
    • http://sp3siemianowice.pl/userFiles/files/63300412905.pdf
    • http://drcleancenter.com/uploads/files/202109230856355263.pdf
    • http://ifap.it/images/file/55786169355.pdf
    • https://aiaciran.org/cache/fck_files/file/poxukekovijunikaj.pdf
    • http://ceresasrl.it/userfiles/files/mizolonajunuvin.pdf
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/1e798fea8881fa42af817e7bf393fa70/48646001693.pdf
    • http://saxonrt.hu/img/userfiles/files/80274115140.pdf
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.com/ckfinder/userfiles/files/wemutak.pdf
    • http://neurooperations.com/ckfinder/userfiles/files/38655041727.pdf
    • http://derp74.fooden.com/UserFiles/files/gozuwevinegefisafipolupi.pdf
    • http://spostojow.pl/userfiles/file/55812788161.pdf
    • http://slsnn.ru/content/files/58323656560.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=which+is+android+phone
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e58a.bin
48c3583693edc05e0e42d0bf5d795ceb483725189709a4e431e9f19100c49134		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE58A 17620 bytes
font_01_sfnt_off00011395.bin
1e1c0d8337bbd88f29e85ef28ee71145a5496effdf9b6bbda2e2b2e6c225927f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11395 10460 bytes
font_02_sfnt_off00012b46.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B46 16792 bytes

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