Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc85060853437d70…

MALICIOUS

PDF

83.0 KB Created: 2021-04-07 20:43:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e743352b15ef476587d2593596e01b55 SHA-1: e0338907eb0b54096a65f909127103e5c9961e1a SHA-256: fc85060853437d70e41719cf64eae869ec75f7d204161e2f861e6b628bb3bfb0
206 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a lure related to a 'Blackstone 17 inch griddle manual', likely intended to trick users into visiting malicious URLs for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://golowaki.ru/123?utm_term=blackstone+17+inch+griddle+manual PDF link annotation
    • http://optarfes.com/3292623220367btq.pdfIn PDF document text
    • https://sinidagiritab.weebly.com/uploads/1/3/5/3/135386058/gazat.pdfIn PDF document text
    • http://surisetufuna.iblogger.org/maths_solver_app_free.pdfIn PDF document text
    • http://1fps.ru/bangladesh_momtaz_video_song7py4l.pdfIn PDF document text
    • http://mail-autoscout24.net/54884509716e8god.pdfIn PDF document text
    • https://walamezer.weebly.com/uploads/1/3/0/7/130740591/5364051.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377674/normal_604aa0e868934.pdfIn PDF document text
    • http://bestplacefor.rest/5681382555095kzi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420034/normal_5ffcff0f6d87e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://danitezuzaja.epizy.com/medical_laboratory_report.pdfIn PDF document text
    • https://2108ee29-f41f-4224-afb3-8e24ca2f7712.filesusr.com/ugd/279473_9d5559adf324440abaa1c27212377e92.pdf?index=trueIn PDF document text
    • https://ddd59a73-be73-4575-bd7b-2e5900175f8b.filesusr.com/ugd/5dc0ef_7cefe91a84e04d3c9fbf44060dcab4c8.pdf?index=trueIn PDF document text
    • http://waxivetik.epizy.com/25003610688.pdfIn PDF document text
    • https://d572dbd6-ec42-402e-884a-3db6daac2318.filesusr.com/ugd/6a558d_64d36663bfe044b783ac35619b744e83.pdf?index=trueIn PDF document text
    • https://a1359116-1358-4cde-afc5-3600b4bb50db.filesusr.com/ugd/3b0c81_671ffd865fba42cfb67f20eecb984f1f.pdf?index=trueIn PDF document text
    • https://2acf176d-1645-44e4-83be-c67f7ac9af6b.filesusr.com/ugd/e72dd6_ba1d0f82adcb4155ba0ae41f7476eba7.pdf?index=trueIn PDF document text
    • https://1618b3f4-dcc0-4047-a816-eeb1cbe43c51.filesusr.com/ugd/a01749_c8b3eda785c24ed4acb42d7f772ca4fd.pdf?index=trueIn PDF document text
    • http://xinudigiwuwa.epizy.com/lazobo.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DB 5600 bytes
SHA-256: 6b06edf517163e4d2f35526b8b209b8810128f0cefa6d306b22a42e0bf14938b
font_01_sfnt_off000114c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C5 12808 bytes
SHA-256: 06fba32344aeea6c76161650ddc3606bd9ac13315d23645db97d5eb6aadb206d

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