Malicious PDF — malware analysis report

Static analysis result for SHA-256 c04c03a7ee48f049…

MALICIOUS

PDF

48.9 KB Created: 2020-03-25 03:58:58 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 6938e35a34a29dd7e0eb89e13aa78c4b SHA-1: 00dc20d6ccda671f7ac6564151427de97467762c SHA-256: c04c03a7ee48f049b11d254205186e24e7caea12ae7da00f61a9b615a82abd8e
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, a technique often used for SEO link farming or to direct users to malicious content. The document body itself is minimal, containing only a question and the PDF generation tool information. The primary heuristic firing indicates a 'PDF_SEO_LINK_FARM', suggesting the document's purpose is to host numerous links to other PDF files, likely as a lure or to manipulate search engine rankings. No scripts were extracted from this sample.

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://escorti-milano.com/uploads/1/3/0/5/130588810/130588810.html#q+significa+cute+en+espa%C3%B1ol PDF link annotation
    • http://luiscunha.net/uploads/1/3/0/3/130379287/4b83ba813.pdfIn PDF document text
    • http://diaryofaformerdoormat.com/uploads/1/3/0/6/130605403/31d08095.pdfIn PDF document text
    • http://gloriagarciafernandez.com/uploads/1/3/0/5/130545957/zilelerapis-gototusesemani-veven.pdfIn PDF document text
    • http://wakesurfingtips.com/uploads/1/3/0/5/130539053/xidujoginoxaz.pdfIn PDF document text
    • http://kokopelliskorner.net/uploads/1/3/0/2/130287872/4169611.pdfIn PDF document text
    • http://www.iamsoundandvideo.net/uploads/1/3/0/5/130539437/da2556c.pdfIn PDF document text
    • http://morph-bcs.com/uploads/1/3/0/6/130621870/vuwiwuduvete.pdfIn PDF document text
    • http://srirachacamp.com/uploads/1/3/0/6/130639884/vuxuwefupugi.pdfIn PDF document text
    • http://theurbanclimatologist.com/uploads/1/3/0/3/130380084/3660287.pdfIn PDF document text
    • http://simplyexquisitehg.com/uploads/1/3/0/5/130588847/jiwapuforigakovosuru.pdfIn PDF document text
    • http://ssenmmh.com/uploads/1/3/0/9/130969462/zirurol.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://www.adobe.com/).NotoIn PDF document text
    • http://www.google.com/get/noto/http://www.adobe.com/type/ThisIn PDF document text
    • http://scripts.sil.org/OFLNotoIn 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_off00006f94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F94 9392 bytes
SHA-256: c1516b3a1032f1c30f09c2e4e7f2de2e47fc174a9c6752c9d19b3400c580ae8f
font_01_sfnt_off000091ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91AC 4144 bytes
SHA-256: 885781ec91db75dc8c4a6a3d3dac0324bdfdb8f2239dab70466c62035ae072da
font_02_sfnt_off00009ea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EA2 16112 bytes
SHA-256: 96ce77eadb5ccb6287397bc6dc51f1ca6434f6c20a9a9635ea42561d8bd7d3ee

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