Malicious PDF — malware analysis report

Static analysis result for SHA-256 332640e0621166a4…

MALICIOUS

PDF

84.5 KB Created: 2021-05-30 05:59:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfeec4246b3d5780105a7d5a66592819 SHA-1: 61659c2eafb4bbc2be86ab1bd5b6e504af05e53f SHA-256: 332640e0621166a48cb7f95cc9c8593a066828fc3f2e7fa66fc201d569f5bc11
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous links pointing to potentially compromised websites and disposable hosting, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 http://younewstoday.com/task/userimages/file/vasomupataverejobidoved.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a06ac29fd67---6307386602.pdf
    • https://aspaeng.com/files/image/files/74398484571.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a0617c5fa---piligoxofatajilogas.pdf
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/94a156615f5b6be4081c18ef7ebb4311/49493090673.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e9997b3030---zirosilazugopasapovile.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078576a333ff---87090167350.pdf
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/fd678868bd9ea32031467717282af0a3/lojonixuf.pdf
    • http://tafgambiatours.com/userfiles/file/56501083769.pdf
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/14vqlo2mee43hn32nond1krfk5/20580124676.pdf
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/tsi6kl2knfktpuerk0u793geql/50999736483.pdf
    • https://aslimitada.com/userfiles/file/36639006474.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f16f918997---bitefede.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bcda7854c9---78446347654.pdf
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/i9per0q9huipsk6uq8tb9psou7/95822063857.pdf
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5265ccf360---23954721695.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=how+to+prepare+for+team+lead+interview
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102db.bin
eeac52f1566ae1bd6f1528871f40b5d3e01d5f03597af9aa8d8f6ab6b38ee8f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x102DB 4908 bytes
font_01_sfnt_off0001137f.bin
13301bbc44fa5d65fdaadfeaeba0353d05096e33997affe4c9cfda6781b1e2fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x1137F 10236 bytes
font_02_sfnt_off0001368e.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1368E 4324 bytes