Malicious PDF — malware analysis report

Static analysis result for SHA-256 e044354595848a52…

MALICIOUS

PDF

84.6 KB Created: 2021-09-06 13:32:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 68ce167e11cdd0def820b2f993da6149 SHA-1: 72c24557ff2b8a5af0d025d075dfd69b04bc238d SHA-256: e044354595848a52c49f1bf37fdbf505e6abe20787e87f430282127713ed8e5f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links pointing to potentially compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. Although no scripts were explicitly extracted, the nature of the PDF and the presence of external links indicate an attempt to deliver a malicious payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://agatanorek.com/files/file/67470067334.pdf In PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd7a987d29---xesorujanezizujomiko.pdfIn PDF document text
    • https://vydavatelstvoklett.sk/userfiles/file/52469920145.pdfIn PDF document text
    • http://ballmillfactory.com/d/files/30572986818.pdfIn PDF document text
    • http://honyi.tw/ckfinder/userfiles/file/15972179520.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd1c29262d---kajosija.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/161132d617e542---42308458832.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/255e297693850d476ae724fd705854a1/kowewebul.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/eb53afe39d38ee4fc547572126b99dcf/48303530557.pdfIn PDF document text
    • http://archissimo.eu/userfiles/files/4795429836.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/161217c91240f0---39499564081.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/zawuzurusijapufowizidat.pdfIn PDF document text
    • http://slp61.com/clients/e/e2/e296dcecfd7d10ffef0cc83fef253c72/File/jonaraxojofedubokut.pdfIn PDF document text
    • https://medius.sk/userfiles/file/74398828260.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/hmk4epuvihc3u57aqp6kujf6s9/41552742142.pdfIn PDF document text
    • http://sporteambiente.it/ckfinder/userfiles/files/wepositobiduzokap.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/edfe5e8e571481e56ec745aa6b00179c/61995696953.pdfIn PDF document text
    • http://sunwisechem.com/Uploadfiles/files/41887435265.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/rilebelukujiriluwulugo.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b017bd1523b---zogibagosunebox.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b3c37fba5---11138166606.pdfIn PDF document text
    • https://sunnyvale.com/wysiwygfiles/file/82135599950.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210604_5D6BA8A17C9AC031.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/5f7aa9a5999194f0970f58601652a591/40075098906.pdfIn PDF document text
    • http://gardatrans.com/content/Files/30220321216.pdfIn PDF document text
    • http://erdbau-rauch.at/24334063461.pdfIn PDF document text
    • http://plncse.hu/php_data/file/munuve.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=biotecnologia+vegetal+y+animal+pdfPDF link annotation
    • http://e1pl2.nazwa.pl/busy/fotki/file/4116239457.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE51 17300 bytes
SHA-256: 5482d350cc3062414a8b121dd6f1d4f86199a69e6bc2373dac8aca8709535326
font_02_sfnt_off00012adb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ADB 10928 bytes
SHA-256: 64dfc581d046523b297563977cfa56949e8a4aa4856bbcd7104e4af4ce868ef0

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