Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c1681751a44a3a5…

MALICIOUS

PDF

34.9 KB Created: 2020-05-23 00:30:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 740103d7611108dec9e445c2bda2e75d SHA-1: b148c17734fb1a89dc6c02506f735fb9b3410d9f SHA-256: 2c1681751a44a3a546ae0d03f4b54d7d6664ef5221fedca7c4bae9d1af7e671c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, a common technique for SEO poisoning or driving traffic to malicious sites. The document body text, while partially corrupted, includes a lure related to 'Professor Messer security course notes' and points to the URL http://order.finalturnracing.com/uploads/1/3/0/7/130740118/130740118.html#professor+messer+security+course+notes. The heuristic PDF_SEO_LINK_FARM indicates a link farm, suggesting the primary purpose is to direct users to a network of related domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://order.finalturnracing.com/uploads/1/3/0/7/130740118/130740118.html#professor+messer+security+course+notes PDF link annotation
    • http://nicholasryan.net/uploads/1/3/0/2/130287997/2570500.pdfIn PDF document text
    • http://nobakebodycare.shop/uploads/1/3/1/4/131452816/wipesajenu.pdfIn PDF document text
    • http://scottmemorialcog.com/uploads/1/3/1/4/131438840/9412926.pdfIn PDF document text
    • http://stoneandsageapothecary.com/uploads/1/3/0/4/130483187/wawegedebugep.pdfIn PDF document text
    • http://nataliebatmitzvah.com/uploads/1/3/0/6/130639336/aa21959.pdfIn PDF document text
    • http://allnbaseball.com/uploads/1/3/0/5/130588506/4e0df1a4882f9.pdfIn PDF document text
    • http://goodforthesoulbydanit.com/uploads/1/3/0/6/130621457/4287634.pdfIn PDF document text
    • http://pandanuspod.com/uploads/1/3/0/6/130621369/8405576.pdfIn PDF document text
    • http://ordinaryexamples.com/uploads/1/3/1/3/131379671/tuvogovonomabetorud.pdfIn PDF document text
    • http://untermyer.org/uploads/1/3/1/3/131398324/7596712.pdfIn PDF document text
    • http://gsstlcenter.org/uploads/1/3/1/3/131383486/1674244.pdfIn PDF document text
    • http://premierbitcoinatm.com/uploads/1/3/0/2/130287454/8931.pdfIn PDF document text
    • http://debraallanconsultants.com/uploads/1/3/0/5/130590008/wogogavifukexov.pdfIn PDF document text
    • http://aydconsultancy.com/uploads/1/3/0/8/130814861/wufonififixavo.pdfIn PDF document text
    • http://tradewindsnursery.com/uploads/1/3/1/8/131871883/riduwijavinoza.pdfIn PDF document text
    • http://kidmyn.com/uploads/1/3/0/7/130775756/vopuwu_fatoxob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 2

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C7B 10380 bytes
SHA-256: 3776d6924ed1a7910444a52de922afa5aee8c70bf9cf6526119c7c16085b1564

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