Malicious PDF — malware analysis report

Static analysis result for SHA-256 5943070a74bb5d02…

MALICIOUS

PDF

76.8 KB Created: 2021-08-19 14:06:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 80501e5b4cc4d8674bdca4826a8b24cf SHA-1: f6d74fcb4b841de4cd3ba4bfeb51b6198427e286 SHA-256: 5943070a74bb5d0237d6a93577cb4f6a2ca774c3f4c3b0f401e97bbb5434a9ba
164 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting, likely intended to lead users to phishing pages or download further malware. The document body was unreadable, but the heuristic findings strongly indicate a malicious intent to redirect users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://dollarplus98.com/images/upload/files/23957713918.pdf In PDF document text
    • http://alpha-cp.com/userfiles/file/lodokowipefixonixipusixij.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16108a13638f83---9936747266.pdfIn PDF document text
    • http://eshop-kocicinadeje.cz/files/file/88758103439.pdfIn PDF document text
    • http://mppscstudy.com/admin/usercontent/file/sarimup.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/0225e0e4ab52b6a89d99e25bb2395300/62881185438.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/b25c229809854e4cb069c2cc90df8d56/sefezumoferakigom.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/tememetujepibuxalibafu.pdfIn PDF document text
    • https://asiahealthcaredentalcentre.com/ckfinder/userfiles/files/48495131183.pdfIn PDF document text
    • http://changwontour.kr/FileData/ckfinder/files/20210617_F2E56FD806D82FE0.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1607adb1993863---misiliribebotidixewer.pdfIn PDF document text
    • http://pujcovnanaradi-tvarozna.cz/userfiles/files/tonewudetigavoj.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a776bdc4f0c---32906848172.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/39178225560.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/d871c812cdda1b30d689ac0b7c125d71/15661024558.pdfIn PDF document text
    • http://manu-transport.com/documents/file/wubuferomubudarozes.pdfIn PDF document text
    • http://standdominica.org/files/files/39407162886.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/633ad0a9729c07b29c49cdb1e75e0add/mominabikolakepekufubegek.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af4619c749a---dagavadadexujukawiv.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/sadamogasanegimurugakax.pdfIn PDF document text
    • https://peterdegendt.be/file/1961660208.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=o+kanha+ab+to+murli+ki+madhur+mp3+ringtone+downloadPDF 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_off0000c72e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC72E 16552 bytes
SHA-256: 8bc02e251cfbb0f3fd3320a4e6e6695d3f8ef879a8d70cb3764c5d633d30f8f3
font_01_sfnt_off0000f26f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A86 11284 bytes
SHA-256: 49e917621f2e0df891cea90c15bccfc4a9fc5abba975141d027422ea40085042

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