Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9fa8eef96a4e938…

MALICIOUS

PDF

47.7 KB Created: 2020-03-27 09:52:45 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-15
MD5: 5848df357d0644c629f2ec6f6724b7de SHA-1: bbd9d1d9bf7febb4068c7c13d46207d9d80d437b SHA-256: a9fa8eef96a4e938ede6a6b3ea8439d77c056121c4c40fe5629232823516b65e
96 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded external links, a technique commonly used to create SEO link farms. The document body itself is minimal, containing only a title and metadata, suggesting its primary purpose is to host these links. The heuristic firings confirm the presence of a link farm and external URIs, indicating the document is designed to redirect users to a network of potentially malicious 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://thervf.com/uploads/1/3/1/3/131382320/131382320.html#800+kilometers+equals+how+many+miles PDF link annotation
    • http://midsomersetmartialarts.com/uploads/1/3/0/8/130813644/fufonawav-vesujepopepaf-redudowuki-jigobobiwulexa.pdfIn PDF document text
    • http://599-bonus.site/uploads/1/3/0/4/130435702/9984685.pdfIn PDF document text
    • http://renegade4christ.com/uploads/1/3/0/7/130738631/ninotedupit-bivuve-tomiv-nesojoxagane.pdfIn PDF document text
    • http://www.mobilehopemn.com/uploads/1/3/0/4/130488743/308b8.pdfIn PDF document text
    • http://zoostr.com/uploads/1/3/0/5/130589283/xojukefuni.pdfIn PDF document text
    • http://leakmarker.net/uploads/1/3/0/7/130739116/tasukepe_kenet_zowoji_risago.pdfIn PDF document text
    • http://insureappleipod.com/uploads/1/3/0/7/130738801/b4af464.pdfIn PDF document text
    • http://www.pantheonadc.com/uploads/1/3/0/7/130740166/353613.pdfIn PDF document text
    • http://ns1.thewaltonagency.com/uploads/1/3/0/7/130740003/sokepasuwexifon.pdfIn PDF document text
    • http://www.wilsonceramicsknives.com/uploads/1/3/0/8/130874021/zonese.pdfIn PDF document text
    • http://kydogsulkey.com/uploads/1/3/0/5/130542770/73cd90fe27bbe.pdfIn PDF document text
    • http://accuflex.ca/uploads/1/3/0/8/130874039/b61bfbcbfb.pdfIn PDF document text
    • http://www.aceslinguists.net/uploads/1/3/0/6/130620471/mawewi-gezivoton.pdfIn PDF document text
    • http://www.postfineartstudio.com/uploads/1/3/1/1/131163718/somewiniwubu.pdfIn PDF document text
    • http://www.privatdagpleje-rynkeby.dk/uploads/1/3/0/5/130542907/rudobo.pdfIn PDF document text
    • http://milwaukeechurches.org/uploads/1/3/0/7/130739578/gamopipa_tatulilijovev.pdfIn PDF document text
    • http://www.kaslearning.com/uploads/1/3/0/2/130289237/rebukubexoxip-dazizopig-xagagibi-joxoxatofiv.pdfIn PDF document text
    • http://urbanaffluence.co/uploads/1/3/0/7/130738803/xejejipemu-xiwufokof-toworiwojewev-wawopaserabuzu.pdfIn PDF document text
    • http://modelizmo.org/uploads/1/3/0/4/130476050/furuwekojopisagobu.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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn 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_off00007266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7266 7140 bytes
SHA-256: c4cee97e821cfddd6d8fa74d4ec06b4f953bc49bbb3b211ec1349f73d1c29078
font_01_sfnt_off00008eb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EB9 2652 bytes
SHA-256: e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea
font_02_sfnt_off00009822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9822 16424 bytes
SHA-256: f66757d7daef2341780680f9f04c2cd2b0044259a7dcdae6d7fc608ddd59702b

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