Malicious PDF — malware analysis report

Static analysis result for SHA-256 171be54286abf099…

MALICIOUS

PDF

102.3 KB Created: 2021-06-25 14:17:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 27da1bc6d93503937cbcae95108faa0c SHA-1: 20c21c169344e3f1c9ab4816d7f4e9d183c08405 SHA-256: 171be54286abf09939d73fefa54202ca7c76b988b769083223ba75907cda1028
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious Link

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document contains a link farm pointing to multiple compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of urgency lures further supports a phishing pretext, aiming to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9896

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 http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4e22e3ee8---fekowazikujuv.pdf In PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/511353f7308db01f33716b459aa19a20/samekodazitev.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/13114016407.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607678b6b5afe---18864513759.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/nejenijeredesalezul.pdfIn PDF document text
    • https://santchavarabed.in/ckfinder/userfiles/files/redoduwege.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/e817ea0821f308d0a31ae75221de1f38/16740058938.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/1143d0a8ea9e5c817e6939feda1e961a/16568742077.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/24848849783.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b26b272dbef---gifujakad.pdfIn PDF document text
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9082e9bd9---vebonexefarubug.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/811k3cbjmn7bfd3v8f40aujij9/wuvebevabus.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/0dfde2797a2abc327de813bd09e51d48/89171168864.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/7362ngjcaml76mb6kj0h9jjlr2/zejenilelemozegidizinos.pdfIn PDF document text
    • http://bukharasuwanee.com/sites/default/files/file/46741436089.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=the+monkey+king+2+tamilPDF 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1A 13340 bytes
SHA-256: da569d929a394c3cac5dc068dcea0caf0fc2ed91f3eed17ee3ed72e86c204047
font_01_sfnt_off000112c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C6 19416 bytes
SHA-256: a8d801e5aa94aa44bd1813dfd47cc49f01fedd9a38ec7282e8561ef88e57820d
font_02_sfnt_off0001441e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1441E 16188 bytes
SHA-256: 43aaf6b7257293a9fb3df01e9826f837cf2b9b92f506adc28ae8aac51b7d6941
font_03_sfnt_off000159cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159CC 10576 bytes
SHA-256: a71b591cbd28765000b46bc70793a6cf52b564a81587e44f8903414d13d7e0c7
font_04_sfnt_off000171d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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