Malicious PDF — malware analysis report

Static analysis result for SHA-256 dedbcd8236563fbd…

MALICIOUS

PDF

45.0 KB Created: 2020-03-29 23:36:03 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 54a4418e4da7b3474eeb86b9c1ee1d42 SHA-1: 8ad844cce280a890be4b6b9e5c49eb47e7c53b06 SHA-256: dedbcd8236563fbd4fbbbd97c4f48b47546cf7390cea4fb0d31112b0b6c627d4
96 Risk Score

Malware Insights

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

The PDF document was generated by wkhtmltopdf and contains a significant number of external links, indicating a link farm or redirection strategy. The heuristic 'PDF_SEO_LINK_FARM' strongly suggests this is an attempt to manipulate search engine results or distribute malicious content through a large number of seemingly unrelated domains. The primary purpose appears to be directing users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://myentouragemusic.com/uploads/1/3/0/5/130550781/130550781.html#dinamicas+de+grupo+para+personas+mayores+en+residencias PDF link annotation
    • http://andepena.com/uploads/1/3/0/4/130483767/9fa7c0080750.pdfIn PDF document text
    • http://amenabandukwala.com/uploads/1/3/0/7/130776271/6191301.pdfIn PDF document text
    • http://noah-alexander.com/uploads/1/3/0/4/130477414/297c43793d3.pdfIn PDF document text
    • http://sevenandheart.com/uploads/1/3/1/0/131071117/c52cab18c.pdfIn PDF document text
    • http://e-dci.com/uploads/1/3/0/7/130739524/povezodesok.pdfIn PDF document text
    • http://potenc-man.space/uploads/1/3/0/5/130538836/32f5b1cf4c0838.pdfIn PDF document text
    • http://allpawsk9rescue.org/uploads/1/3/0/6/130605497/fojipeme_mugoruxutiv_lozezoto_laxudutafaxo.pdfIn PDF document text
    • http://mrsjessinaanderson.com/uploads/1/3/0/6/130620567/527348.pdfIn PDF document text
    • http://thebighooyah.com/uploads/1/3/0/4/130436136/b44fe5f76.pdfIn PDF document text
    • http://alyssarosefit.com/uploads/1/3/0/6/130621071/xozepupipuwav.pdfIn PDF document text
    • http://midwestautomotiveconsulting.com/uploads/1/3/0/8/130814674/lemun_xitolugevosuwi_vejofibivito_rigugege.pdfIn PDF document text
    • http://lockoutservicestatenisland.com/uploads/1/3/0/3/130379423/rupogobutu.pdfIn PDF document text
    • http://lavonnaturals.com/uploads/1/3/1/3/131380728/6776877.pdfIn PDF document text
    • http://dakotaadornments.com/uploads/1/3/0/2/130289561/ebcbda50f.pdfIn PDF document text
    • http://cherylspencerhartman.com/uploads/1/3/0/7/130740538/c945d9dafc1.pdfIn PDF document text
    • http://patrickbarrystoryteller.com/uploads/1/3/0/4/130435609/buwimazuwubis_numozejido_zebuwav.pdfIn PDF document text
    • http://amazonadvertising.org/uploads/1/3/0/6/130604151/2b82f071f426.pdfIn PDF document text
    • http://mail.mattlarocca.com/uploads/1/3/0/6/130621277/fbcada7f6af.pdfIn PDF document text
    • http://tennisbuddy4u.org/uploads/1/3/0/3/130379610/kixarunativ.pdfIn PDF document text
    • http://sharedsuccesssolutions.com/uploads/1/3/0/6/130603740/lenoke.pdfIn PDF document text
    • http://coloradoboardbenders.com/uploads/1/3/0/9/130969356/1912111.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75C8 6728 bytes
SHA-256: 5278024270de67705d3a5034a26ce2f5e1d9e53f50705cc770b2190155f81e7b
font_01_sfnt_off0000866b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x866B 7932 bytes
SHA-256: e614e4c157a49a176b4cb3ab2ad35af96116f588454bb4d37c45532850ab371d