Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aa02bfb3b2e4d54…

MALICIOUS

PDF

86.2 KB Created: 2021-06-26 02:11:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7dee7bd0cd412bffa3bac3f4b5e982f2 SHA-1: 58c7c314304c8e401d71236effec808a46490538 SHA-256: 0aa02bfb3b2e4d541bfff4386eed3c7174e844cea954c7b9b594d2dea778fa42
176 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URIs, many of which point to compromised WordPress installations or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of an IP address literal in one of the URIs further increases suspicion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://bartuceviri.com/userfiles/file/dekabazekakusole.pdf In PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/75ffctmnda9o2jalkk6t4ifi66/lupekavobewux.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/4902640114.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/3d2036889b64a77196b7f3b836438412/tujowixolewarobotalabipo.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/gilusofasinagovojagogiwel.pdfIn PDF document text
    • https://agencement-menuiserie-var.fr/stockages/files/rimadugejavolibido.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b588ed5b1d---gusolopugezerukagusupuju.pdfPDF link annotation
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160947d8d17a70---tumababawupavodekuju.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/rusekubilukizizadolafi.pdfIn PDF document text
    • http://kingcraftviet.com/uploads/ckfinder/files/zururezuxuminamudirew.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607edf9c9d2c5---larusufisen.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be5f2b3743d---xobunipowubexorezofolivol.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/40436495680.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076257219721---wegojap.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/ad31e4eae2c5d83c1076e4f86188722b/tesotot.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/1524478d37eda18929907e7a37031e37/gugeredovexoda.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/muxujer.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc07a2aea0---futesig.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/347ee392d44df1b0c6ced8b4da975523/20369845777.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/383100edb3ded4002e6bb8d57de01196/wejepegijazixakezirudeva.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/1tpunh176m6ict27924scvv0v2/muxebululusogaxorikurezi.pdfIn PDF document text
    • http://sergey-yushkov.com/pict/file/jepabilizevudubilaval.pdfIn PDF document text
    • https://x-software.cz/data/file/88398127642.pdfIn PDF document text
    • http://biomisszio.hu/tmp/radufetozilawik.pdfIn PDF document text
    • https://tosto.cl/ckfinder/userfiles/files/babojapovoxo.pdfIn PDF document text
    • http://nesemlak.com/test/images/uploads/files/69979167702.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=protein+energy+malnutrition+definitionPDF 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_off0000ec2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10442 10744 bytes
SHA-256: e6c22f43d7095325e85f6a5b8102f024a2f7988f38a628759149a7f290b993be
font_02_sfnt_off00011cb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB8 18100 bytes
SHA-256: d2f2fa1f4bfa94f321d93c85abaa646baa4630386d9c842433be260b1ca7d99f

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