Malicious PDF — malware analysis report

Static analysis result for SHA-256 29cc2865272889c1…

MALICIOUS

PDF

87.2 KB Created: 2021-07-17 13:50:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 5682bdb948f68967aff08d7324506354 SHA-1: ef3aecf243ca42d0ea5203eacd1053bf444dc633 SHA-256: 29cc2865272889c1b10bc219cdc46e2e3e0bab9893c1330b9037a1608d73d471
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-severity PDF_RANDOM_URL_LINK and PDF_SEO_DISPOSABLE_LINK_FARM. The file contains numerous links to external websites, many of which appear to be hosted on compromised WordPress installations or disposable domains. The primary function of this PDF is to serve as a link farm, directing users to these external resources which likely host further malicious content or phishing lures. No scripts were extracted, but the structure suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/28ae61d371fa01a4ae9ef1b02abe9b58/murukudejamipog.pdf In PDF document text
    • https://propertiproperty.com/Uploads/userfiles/files/58637498768.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160788a7664706---rabonopomeserowibeku.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/7aebe2cdb2c98e19eef9e1231e1ccb91/79966371815.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607347ee8aff7---52789379797.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/lesupovexujapirivesip.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/jfj8dtqauro5tjb4j7h213s7m1/zobovagob.pdfIn PDF document text
    • https://topupdana.com/contents//files/71434543088.pdfIn PDF document text
    • https://hobbes-group.com/upload/files/28666003323.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/633e5d45ed82827ea8433b3d24158149/12420165660.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/fcf9454866e56f7697a88a7bad49d661/28850456774.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608181a277d1f---tuzeririribefejimofivavo.pdfIn PDF document text
    • http://ecotrans.vn/upload/userfiles/files/42363520245.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/moburiwenekugolema.pdfIn PDF document text
    • https://kclandscapes.com/ckfinder/triplebuserfiles/file/10587974170.pdfIn PDF document text
    • https://lee-trading.tw/archive/upload/files/kekeju.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160770690b9779---gosajaniwaguno.pdfIn PDF document text
    • http://wignaccent.com/FCKeditor_2.6.3/userimages/file/20210709195131.pdfIn PDF document text
    • https://natyabio.com/uploadfiles/78925695803.pdfIn PDF document text
    • http://gianniarnaudo.com/userfiles/files/16932523963.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/b1554107d68834eb8809ce0b079c7795/86228074790.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/4a172745cdf0aa25d246142145939ac6/dejopuxusobenexasisivu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=free+online+games+to+play+with+friends+on+phonePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F9 17208 bytes
SHA-256: 89709fed8c6f4402fd29ae6f732fec45ab52f4d80f662a023cffab44d3c3c0c6
font_01_sfnt_off00011dd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD5 11124 bytes
SHA-256: 019ba99606e8fdcab64c664535429b0eee6537e0dc691106d54e010b2ce35b15
font_02_sfnt_off00013771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13771 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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